GNU Image Manipulation Program - One of the most popular Photoshop alternatives with an impressive feature set and versatility.
GNU Image Manipulation Program Plugins
PhotoGIMP - A patch that makes the UI and keyboard shortcuts much more like Adobe Photoshop, for those that are accustomed to that experience.
Resynthesizer - "Texture synthesis" plugin that functions much like the content-aware filter from Photoshop.
Both Darktable and RawTherapee (see Photo Management below) can also be used as plugins!
Wavelet Decompose - Separates an image into layers based on frequency, with each layer containing a unique details from the original image. This can be helpful for skin retouching or smoothing specific parts of an image.
G'MIC - Offers hundreds of configurable filters for digital image processing.
elsamuko - Small collection of stylish filters and effects.
Beautify - Adds lots of filters with varying texture and color.
ReFocus - Attempts to correct the focus of an image after scanning, scaling, and other manipulations have left the pixels of the image a bit blurry.
ContrastFix - Helps you correct contrast issues in photos using masks.
PurpleFringe - Corrects the "purple fringe" effect that occurs due to chromatic abberation.
Lensfun - Corrects photographic lens errors with a large database of supported lenses.
Hugin - Allows you to "stitch" photos together to make a larger, panoromic image.
BIMP - Allows you apply edits to a whole batch of photos at once.
GIMPHelp Scripts - Over 100 miscellaneous scripts maintained by a small team.
Photo Management
Darktable - Virtual lightroom and darktable for photographers, allows for processing of raw image files.
RawTherapee - Like Darktable with a steeper learning curve, but with excellent HDR and tonemapping capability.
DigiKam - Tool for sorting and organizing expansive collections of photos, with batch editing features.
Photoprism - AI-powered application for advanced photo organization and easy sharing.
HDRView - High-dynamic range image viewer for viewing and comparing images with support for many file types, 10-bit displays, and Apple EDR.
Siril - Advanced astronomical image processing for space photographers. Provides calibration, enhancement, and more.
pngquant - Efficient command line utility for compressing PNG files.
Graphic Art
Krita - Advanced painting program for artists of any skill level. It's cross-platform, feature-rich, customizable, and intuitive to use. It even provides some photo manipulation and basic animation capability.
Inkscape - Excellent vector art program for designers and illustrators.
Graphite - Alpha-stage graphics editor for 2D raster and vector art, powered by a node graph compositing engine. It is lightweight and runs in your web browser.
MyPaint - Simple paint program with a distraction-free fullscreen mode and an infinite canvas. No longer actively maintained.
Our Paint - "Featurless" painting tool that is heavily programmable and customizable with a borderless canvas.
Drawpile - Drawing program with a canvas that can be shared in real-time by multiple users over the internet. Seemingly no longer maintained, but still a lot of fun.
WBO - Another tool similar to Drawpile, with real-time online "whiteboard" drawing.
Rickrack - Fun and user-friendly color palatte generator.
BeeRef - Simple but extremely useful reference image viewer, recently forked and once again receiving updates.
Silky Shark - Mouse and tablet stabilizer, excellent accessibility tool for those that struggle keeping a steady hand.
Font Manager - Made to help users manage system fonts easily on Linux, and it's a great tool for graphic designers.
MFEKglif - Typeface editor for making custom fonts.
Animation
Blender - Incredible software that offers professional capability in 3D modeling, 3D animation, 2D animation, CGI/VFX, and more.
agmmnn's Awesome Blender repo has a massive list of open source plug-ins that could help improve your workflow in Blender.
MakeHuman is an additional piece of software for creating rigged, humanoid character models to import directly into Blender.
SheepIt Client is an open-source client for the free, distributed SheepIt render farm.
Sequence Menu adds an enhanced UX and new features for the Blender Video Sequence Editor.
BlenderBIM & ifc-git work together to allow you to browse branches and revisions of an IFC file in a git repo, or create a new repo.
Audacity Tools for Blender allows you to use Blender's video sequence editor in sync with Audacity for better audio filtering and more.
Flatterer turns 3D models into a set of 2D shapes for laser cutting.
Tooll 3 - Amazing realtime animation toolkit for motion graphic artists that can be used in audio-reactive VJ content, automating keyframe animation, development of fragment or compute shaders, and much more.
OpenToonz (Morevna Edition) - 2D animation program geared toward traditional frame-by-frame animation with support for plug-ins that utilize deep learning to add impressive visual effects, based on software adopted and customized by the incomparable Studio Ghibli. The Morevna Edition includes a more intuitive UI, brushes from MyPaint, an advanced color selector, and more.
KumoWorks is a cloud rendering tool for OpenToonz animations
enve - Impressive 2D animation and motion graphics software with support for both raster and vector art, sound, and video files.
Synfig Studio - 2D animation software that appears to be no longer actively maintained, though it is feature-rich and provides support for bone rigging, cut-out animation, and traditional frame-by-frame.
Pencil2D - Minimalistic, cross-platform 2D animation software that allows for easy switching between raster and vector workflows.
FreeMoCap - Advanced but usable motion capture framework for everyone!
Infinigen - A powerful tool for procedural generation of infinite, photorealistic worlds with real geometry.
Papagayo-NG - Tool for generating 2D lip sync animation. The result typically needs some manual tweaking, but it takes a lot of work out of the process. It works with Synfig, OpenToonz, and Krita, among others.
Storyboarder - Storyboard and animatic software for easy visualization of your film/animation project during the pre-production phases.
MoonRay - Dreamwork's Monte Carlo Path Tracer renderer used in their animated films.
Pixie - Photorealistic, ray-traced renderer similar to Pixar's proprietary RenderMan.
LuxCoreRender - Physically-based and unbiased rendering engine.
RenderChan - Rendering manager for 2D animation projects.
Universal Scene Description (USD) - Format made by Pixar that combines lots of scene data and allows for real-time collaboration between artists across multiple applications.
Wick Editor - Adobe Animate-inspired animation tool with bulit-in scripting.
Streaming
OBS Studio - A brilliant piece of software for livestreaming and video recording.
OBS Background Removal Plugin creates a virtual green-screen for portrait background removal without needing an actual green-screen.
NoiseTorch - Real-time mic noise suppresion for Linux.
Video Production
kdenlive - Video editor with multi-track capability, support for a wide varitey of video and audio formats, and a suite of useful production tools. It's been in active development since 2002!
Shotcut - Video editor with professional audio processing features, lots of video effects, and a customizable interface with undockable panels. It also boasts support for some video-related hardware.
Pitivi - Video editor with a focus on design and usability, with natural integration into the GNOME desktop environment.
Flowblade - Video editor with a multitude of included tools, boasting stability and a speedy workflow.
Olive Video Editor - Video editing software with node-based compositing built-in and fast disk cache performance.
OpenShot - Simple, bare-bones video editing akin to Windows Movie Maker or iMovie.
Avidemux - Small but mighty. Ideal for quick edits, filtering, and encodes.
OpenColorIO - Color grading/management tool for use with Olive Video Editor, Blender, Krita, and more.
Natron - Professional compositing software for Motion Graphics and VFX.
Open RV - Award-winning image and sequence viewer for VFX artists and animators.
xSTUDIO - Similar to Open RV, this is another media playback and review program for film and animation.
Handbrake - Powerful, cross-platform video transcoder.
Video Hub App - Brilliant tool for organizing and managing video libraries, great for filmmaking and media consumption. Pre-built binaries are available for $5 (most of which goes to charity), or you can build it from source for free!
CAD Software
FreeCAD - 3D parametric modeler for product design, mechanical engineering, and architecture. Features Python integration, OpenSCAD integration, and 2D drafting.
QCAD - Another excellent CAD program with layers, grouping, 60+ tools, a part library with 4800+ CAD parts, and more.
OpenSCAD - Code-based, non-interactive 3D modeling workbench.
Audacity - Simple, intuitive multi-track recorder and waveform editor. It has been around since 2000 and remains an exceptionally popular tool for audio recording and editing.
Tenacity - A fork of Audacity from an older version (3.0.2), now taking the project in a new direction.
Wavacity - Another fork of Audacity, but this time ported to the web browser!
Music Source Separation Libraries
Open-Unmix - CLI program that will attempt to separate individual tracks from an audio recording using PyTorch.
Spleeter - Another music source separator developed by Deezer developers.
Demucs - Yet another, but developed by Meta researchers (I know, I'm sorry, but it is entirely FOSS).
Metadata Management
Tone - Audio tagger for dumping and editing metadata from multiple audio formats, such as FLAC, MP3, M4B, and more.
DAWs
Digital Audio Workstations
Ardour - Full-featured, cross-platform, multi-track workstation & MIDI sequencer with support for VST, LV2, and LADSPA plugins. Best option for working with audio tracks.
Qtractor - Multi-track recorder/editor with a powerful MIDI sequencer for Linux. Supports VST, LV2, DSSI, and LADSPA plugins. Not as capable as Ardour in working with audio tracks, but much better at handling MIDI tracks.
MusE - Complete multitrack DAW for Linux that handles both MIDI and audio tracks.
Zrythm - An in-development automated and convenient workstation for music production.
Helio - Remarkably intuitive and concise sequencer with helpful visualization tools.
LMMS - Ideal workstation for beatmaking or a loops-based workflow, like you may find in FL Studio or Ableton Live, though it does not feature native audio recording.
ossia score - Intermedia sequencer with mixed node-based and timeline workflow.
Ensembles - Digital workstation for arranging music for live performance, not targeted toward studio recording.
Rosegarden - MIDI sequencer and editing tool for composers with classical music notation built-in.
Audio Plugins
Plugin Hosts
Carla - Non-linear plugin host for running plugins outside the DAW, using Windows VSTs on Linux, and more.
Yabridge - Seamless support for both 64-bit and 32-bit VSTs (VST2 & VST3) on 64-bit Linux hosts.
AudioGridder - Allows users to offload DSP processing to remote computers to save system resources when using intensive plugins.
Element - VST plugin that is itself a modular, node-based plugin host that allows you to chain together plugins to create powerful new sounds.
Packs
Calf Studio Gear - Extensive pack of LV2 plugins including instruments and effects in modulation, delay, dynamics, EQ, and more.
Socalabs Plugins - Collection of useful plugins including a great reimplementation of mverb, some basic effects, several synths inspired by retro video game consoles, utility plugins, and more.
DPF-Plugins - Small collection of plugins by DISTRHO in LADSPA, DSSI, LV2, VST2 and VST3 formats.
DISTRHO Ports - Collection of open-source plugin ports to Linux, including the popular TAL-Noisemaker, Vitalium, mverb, and more.
IEM Plug-in Suite - Plugin suite comprised of a great multi-band compressor, encoders, decorders, and visualization tools.
Zam-Plugins - Several audio plugins including a really nice dynamic EQ and more, all in LV2 or VST formats.
Invada Studio - Pack of basic effects, filters, and more.
DrumGizmo - Drum sampler plugin with great samples and support for eDrum triggers (with positional sensitivity in the works).
x42 AVL Drums - Acoustic drum sampler plugin, now with three great sounding kits.
Hydrogen - MIDI drum machine that can be used on its own or as a sequencer and trigger for external virtual drums (like DrumGizmo) and other virtual instruments.
x42 setBfree - Classic tonewheel organ, great for jazz, blues, and more.
Orchestools - This is actually 4 plugins: Strings, Brass, Winds, and Percussion. Together, you will have all of the sounds of a symphony orchestra at your disposal.
Sampling
Drops - For easily processing samples and cutting loops.
C1Bitcrusher - Authentic sounding bitcrusher in VST2 format.
CHOW Tape Model - Digital emulation of analogue, reel-to-reel tape saturation.
Roth-AIR - Combines multiband compression and gentle saturation on high frequencies to add a crispy, airy presence to your tracks that is great for vocals, synths, strings, and more.
GxPlugins - Suite of LV2 plugins intended to be a standalone expansion to guitarix.
BYOD (Build-Your-Own-Distortion) - Allows the user to create custom guitar effects from distortion and tone-shaping effect emulation in a node-based UI.
SmartGuitarAmp - Uses machine learning to simulate real-world guitar amplifiers.
Bosca Ceoli - Tracker that comes pre-loaded with over one hundred MIDI and chiptune instrument sounds.
MilkyTracker - Chiptune synthesizer and sequencer.
klystrack - Simple but powerful four-track synth and sequencer.
SunVox - Small modular synth for a variety of devices.
Schism tracker - Open source re-implementation of Impulse Tracker.
HUGETracker - Tracker for Game Boy homebrew and chiptune composers.
FamiStudio - Tracker for NES/Famicom homebrew and chiptune composers.
GoatTracker 2 - Tracker for Commodore 64 homebrew and chiptune composers.
DJ Software
Mixxx - Community-driven software with dozens of features for newbie DJs and master turntableists alike.
Music Notation
MuseScore - Create and print your own sheet music in multiple formats (including classical, jazz chord charts, tableture, vocal arrangements, and more), with a clean UI and support for MIDI keyboard input.
LilyPond - Flexible software for making beautiful, printable sheet music. It is extremely customizable and can be expanded for practically any kind of notation you might need.
Chordly - Easily create simple chord charts with lyrics and transpose chords as needed.
Writing
Specialized Word Processors
Bibisco - Novel writing application with additional tools to aid in character development and world building, organizational featues, and the capability to anaylize your novel and provide helpful data at a glance.
Manuskript - Software for storytellers who are also planners, offering a detailed, hierarchal outliner and "novel assistant" to help you think it all out before you've started writing, as well as a distraction-free text editor.
Kit Scenarist - Cross-platform screenwriting application with a handy research module for easy reference of research material and virtual cards for mapping out your story structure.
GitBook - Software that takes advantage of Git's version control system for technical writing and documentation.
Twine - Tool for developing non-linear, interactive fiction.
Text Editors
ghostwriter - Text editor that allows you to use Markdown to create documents in various formats, all within a clean and customizable interface.
Emacs - Advanced, power-user text editor with content-aware editing modes, built-in documentation, and much, much more.
Spacemacs - Alternative to Emacs with a VIM-like featureset incorporated into the editor.
espanso - A "text expander" that allows you to code custom keywords to make your typing more efficient.
Notebooks
Joplin - Cross-platform note-taking app with end-to-end encrypted note syncing between devices and a handful of other great features.
Turtl - Secure notebook app with an emphasis on collaboration.
EteSync Notes - Self-hostable, encrypted notes app for mobile and web.
Office Suites
LibreOffice - A truly free and complete office suite for everyone.
OnlyOffice - Modern, full-featured Office alternative for collaborators. Excellent compatability with Microsoft Office documents.
CryptPad is a self-hostable, cloud-based office solution that integrates OnlyOffice tools in the web browser, similar to Office365, and includes other features like Kanban and a real-time whiteboard aapplication.
Editing
LanguageTool - Grammer, style, and spell checker in the form of a desktop app, webapp, browser add-on, office-plugin, and more. Supports several common languages and counting.
Expresso - Webapp for fast neural network analysis of your text style to provide useful feedback metrics to English writers.
Translation
LibreTranslate - Machine translation API for text and documents that is self-hostable, can be used offline, and has a free webapp.
Publishing
LaTeX - Document and book formatting software for anything from scientific research papers to high fantasy novels.
Scribus - Versatile desktop publishing toolset for finalizing print-ready books, magazines, and more.
gscan2pdf - Easily make PDFs or DjVus from scanned documents.
Software Development
APIs
Public APIs List on Github - Very long, organized list of free public APIs for your development projects.
Code Editors
VSCodium - Forked version of Microsoft's open source VSCode, relicensed under the MIT license and without telemetry.
Geany - Programmer's text editor and IDE that is lightweight, customizable, and supports many plugins.
Notepad++ - Simple notepad and source code editor for Windows.
UX/UI Design
penpot - Web-based design and prototyping platform made for cross-domain teams, a noteworthy alternative to Figma.
Pencil Project - Cross-platform tool for making GUI prototypes.
Alva - Tool for making "living" prototypes with working code components.
Excalidraw - Generic, intuitive, in-browser sketching tool for quick concepting.
Akira - Offline generic sketching tool, also great for concepting.
Icon Shelf - Icon manager for web developers where all icons are copyable as code.
Version Control
Meld - Offline tool for comparing and/or merging files and folders on your sytem. Extremely useful for general organization and project management, and can be useful for lots of tasks outside of software development, too.
Game Development
Game Engines
Godot - Impressive engine for making professional games in 2D or 3D. Supports multiple languages, including C++, C#, and the developer's own GDScript. It also offers visual scripting tools, VCS integrations (git, etc.), and can deploy to any modern desktop or mobile OS (or even game consoles, with third-party support).
Keychain is a plugin that provides a control re-mapping system for the players of your game.
Armory3D - Powerful 3D game engine that integrates with Blender. Made by the team behind ArmorPaint and ArmorLab.
GDevelop - Easy-to-learn 2D game engine that requires no coding knowledge and includes all the assets one would need to start learning game development. It also offers live previews of your game, easy integration with third-party tools, JavaScript support for building more complex games, and extensive tutorials on their website.
GDevelop-extensions is a GitHub repo of open-source, community made extensions for GDevelop.
Bevy - Exciting cross-platform, data-driven game engine for Rust developers, currently in active development, with a growing assortment of community plugins and assets available.
The Unofficial Bevy Cheatbook has a list of excellent plugins, in addition to loads of instruction and documentation.
libGDX - Cross-platform, Java-based game engine behind many popular indie games. Offers a unified API and extensive third-party plugin support.
Panda3D - Engine for real-time 3D games and other applications (visualizations, simulations, etc.).
LÖVE - Framework for building 2D games easily with the Lua scripting engine.
Superpowers - Game engine made with ease of use and real-time collaboration in mind, using TypeScript for game logic. It includes free assets and allows users to publish to multiple platforms, including web browsers.
Spring - An engine specifically built for making custom RTS games with Lua scripting.
AI
Fluent Behavior Tree - Behaviour tree library written in C# with a fluent API and good documentation.
SimpleAI - Lightweight behavior tree written in C++ with optional LUA bindings.
Bonsai - Behavior tree written in Rust with nice documentation.
Modular Behavior Tree - Behavior tree in JavaScript that provides basic nodes and provides the ability to write and add your own.
Pixelorama - Suite of tools for making sprites, backgrounds, tiles, pixel art animations, etc.
Piskel - Editor for animated sprites and pixel art, works in-browser and as a standalone application.
LibreSprite - Totally free fork from the last GPLv2 commit of the popular open source Aseprite pixelart program. While it's missing some newer features and bugfixes from the current versions of Aseprite, the developers are working on a ground-up rewrite with exciting new features that is worth keeping an eye on.
EZSpriteSheet - Spritesheet packer that can even import from GIFs and WEBPs.
ChipTone - Easy to use SFX synthesizer with tweakable example presets, with a sampler and sequencer built-in.
JFXR - Webapp for generating sound effects for your games, with semi-randomized presets.
BeepBox - A simple browser-based chiptune synth and sequencer for game music loops and SFX.
LabChirp - Versatile sound effect generator with great documentation.
Dialogue
Yarn Spinner - Tool for game writers to build branching dialogue and narratives for games.
Public Domain Resources
Please refer to the licensing information on each individual site for details.
Colors
LOSPEC - Open source website with a community-built and searchable list of pixel art palettes, library of tutorials, and more.
Fonts
ForkAwesome - Open source fork of "FontAwesome," a stellar font and CSS toolkit.
OpenDyslexic - An accessible typeface for dyslexic readers.
TextVide - Open source reimplementation of "Bionic Reading," an accessibile font for neurodivergent (primarily ADHD/autistic) readers.
Game Assets
Kenney Assets - Free pixel art game assets & sprite sheets under the Creative Commons 1.0 Universal license.
DevAssets - 2D and 3D game assets freely available for any project, commercial or not.
Quaternius' Assets - Free low poly, sometimes animated 3D models under CC0 license.
ambientCG - Free CC-1.0 Universal licensed resources for 3D modeling including textures, assets, and more.
OpenGameArt - Primarily 2D pixel/isometric/low poly art, effect animations, and more.
Music / Sound
Audionautix - Free production music for any use (even commercial) as long as credit is provided, under the Creative Commons Attribution 4.0 International License.
Rauversion - Open source, self-hostable music platform akin to Soundcloud.
Funkwhale - Fediverse music sharing platform (alternative to GrooveShark).
Maintainers
If you have questions or feedback regarding this list, then please create
an Issue in our tracker, and optionally
@mention one or more of our maintainers: