List of awesome open source applications for macOS. This list contains a lot of native and cross-platform apps. The main goal of this repository is to find open source and free apps and start contributing.

Audio

• Background Music - Background Music, a macOS audio utility: automatically pause your music, set individual apps' volumes and record system audio.
• Cog - A Free and Open Source Audio Player for Mac OS X 10.7+.
• [Un]MuteMic - macOS app to mute & unmute the input volume of your microphone. Perfect for podcasters.

Video

• IINA - The modern video player for macOS.
• Yoda - Yoda is a nifty osx application which enables you to browse and download videos from YouTube.
• WebTorrent Desktop - The streaming torrent app. For Mac, Windows, and Linux.
• Caption - Caption takes the effort out of finding and setting up the right subtitles.

Music

• lyricsify - A simple Spotify lyrics viewer menu bar app for macOS in Swift.
• DeezPlayer - Deezer Desktop app for Windows, Linux and macOS.

Images

• Imagine - Imagine is a desktop app for compression of PNG and JPEG, with a modern and friendly UI.
• ImageAlpha - Mac GUI for pngquant, pngnq and posterizer.
• WebPonize - WebPonize is a Mac OS App for converting PNG, JPEG, animated (or not) GIF images into WebP.
• Freehand - A MacOS Status Bar App for quick sketch.
• Screenbar - A MacOS menubar app for automating screenshots.

Social Networking

• Goofy - Unofficial Facebook Messenger client.
• Caprine - An elegant Facebook Messenger desktop app.
• Ramme - Unofficial Instagram Desktop App.
• appear.in - Unofficial appear.in app.
• Quail - Unofficial esa app.
• Simpo - A macOS menubar app to post status quickly.

Chat

• ChitChat - A native Mac app wrapper for WhatsApp Web.
• Telegram Desktop - Telegram Desktop messaging app.
• Textual - Textual is an IRC client for OS X.
• Electronic WeChat - A better WeChat on macOS and Linux.
• Telegram [Deprecated] - Source code of deprecated Telegram for macos version.
• Telegram - Source code of Telegram for macos on Swift.
• Rambox - Free, Open Source and Cross Platform messaging and emailing app that combines common web applications into one.
• Google Allo for Desktop - A native OS X & Windows desktop app for Google Allo.
• GroupMe - Unofficial GroupMe App.

Streaming

• Galeri - A perpetual artwork streaming app.

Development

Git

• GitHub Desktop - Simple collaboration from your desktop
• GitUp - The Git interface you've been missing all your life has finally arrived.
• gitbar - Open source github contribution stats on your Mac OS X Menu Bar.

iOS / macOS

• CocoaRestClient - A free, native Apple macOS app for testing HTTP/REST endpoints.
• Knuff - The debug application for Apple Push Notification Service (APNs).
• Touch Bar Simulator - Use the Touch Bar on any Mac.
• WWDC - The unofficial WWDC app for macOS.
• iOS Images Extractor - iOS Images Extractor is a Mac app to normalize , decode and extract images from iOS apps.
• SmartPush - iOS Push Notification Debug App.
• Cleaner for Xcode - Cleaner for Xcode.app built with react-native-macos.
• AppleEvents - The unofficial Apple Events app for macOS.
• Attabench - Attabench is a microbenchmarking app for macOS, designed to measure and visualize the performance of Swift code.
• Asset Catalog Tinkerer - An app that lets you open .car files and browse/extract their images.
• IconGenerator - A macOS app to generate app icons.
• AppleTrace - Trace tool for iOS/macOS.
• Iconizer - Create Xcode image catalogs (xcassets) on the fly.
• j2s - A macOS app to convert JSON objects into Swift structs (currently targets Swift 4 and Codable).
• PushNotitication - A macOS app to test push notifications on iOS and Android.
• Localizations - Localizations is an OS X app that manages your Xcode project localization files (.strings).
• AppBox - AppBox is a tool for iOS developers to build and deploy Development, Ad-Hoc and In-house (Enterprise) applications directly to the devices from your Dropbox account.
• Menubar Colors - A macOS app for convenient access to the system color panel.
• AppIcons - AppIcons is a tool for generating icons in all sizes as required by macOS and iOS apps.
• Alloy - Alloy is a simple toolkit that makes your iOS / OS X apps development more easier.
• Icons.app - App for macOS which is designed to generate consistent sized icons of an existing application in various states, jiggling (shaking) etc.
• Touch Bar Preview - A small open source app to display your designs on the Touch Bar of the new MacBook Pro.
• LayerX - An intuitive app to display transparent images on screen.
• Board For GitHub - A small application to monitor your GitHub project web page in a native macOS app :octocat:!
• ResignTool - This is an app for macOS that can (re)sign apps and bundle them into ipa files that are ready to be installed on an iOS device.
• FilterShop - A macOS App to explore CoreImage Filters.
• TransporterPad - iOS/Android app deployment tool for macOS.
• iSimulator - iSimulator,iOS Simulator Sandbox,like simpholders,a macOS app to find simulator's sandbox and go.
• Assets - Assets is a macOS app that manages assets for your developement projects (Xcode, web, etc).

Web development

• Now Desktop - Create deployments right from the tray menu.
• CoreOS VM - CoreOS VM is macOS status bar app which allows in an easy way to control CoreOS VM on your Mac.
• Mockup Generator - Mockup Generator is a macOS app built with AngularJS/Electron that sits in your menu bar allowing you to capture screenshots of your favourite websites and wrap them in device mock-ups.
• aws-s3-uploader - Simple macOS app for uploading files to Amazon Web Services.
• stts - stts is a macOS app for monitoring the status of cloud services.
• Lantern - A dedicated Mac app for website auditing and crawling.

Other

• Cakebrew - Manage your Homebrew formulas with style using Cakebrew.
• Gas Mask - Hosts file manager for OS X.
• Hosts - a Cocoa GUI for /etc/hosts.
• ImageOptim - GUI image optimizer for Mac.
• Postgres.app - The easiest way to get started with PostgreSQL on the Mac.
• QorumLogs - Swift Logging Utility for Xcode & Google Docs.
• Sequel Pro - MySQL/MariaDB database management for macOS.
• Unused - A Mac app for checking Xcode projects for unused resources.
• Vagrant Manager - Manage your vagrant machines in one place with Vagrant Manager for macOS.
• Reactotron - A desktop app for inspecting your React JS and React Native projects. macOS, Linux, and Windows.
• SwiftyBeaver - Convenient logging during development & release in Swift.
• Shuttle - A simple SSH shortcut menu for macOS.
• Lepton - Democratizing Code Snippets Management (macOS/Win/Linux).
• JSONExport - JSONExport is a desktop application for Mac OS X which enables you to export JSON objects as model classes with their associated constructors, utility methods, setters and getters in your favorite language.
• Specht - A rule-based proxy app built with Network Extension for macOS.
• Keyframes Player - A simple macOS app to preview animations created with Facebook's keyframes framework.
• APNGb - macOS app which assembles and disassembles animated png files.
• macGist - Simple app to send pasteboard items to GitHub's Gist.
• Ruby.app - macOS app that contains a full Ruby installation (for use with Ruby/Gosu).

IDE

• Atom - The hackable text editor.
• ZeroBraneStudio - ZeroBrane Studio is a lightweight cross-platform Lua IDE with code completion, syntax highlighting, remote debugger, code analyzer, live coding, and debugging support for various Lua engines.

Editors

• CotEditor - Lightweight Plain-Text Editor for macOS.
• MacVim - Vim - the text editor - for macOS.
• TextMate - TextMate is a graphical text editor for macOS.
• VimR - Project VimR — Refined Neovim experience for macOS.
• CotEditor - CotEditor is a lightweight plain-text editor for macOS.
• Qilin Editor - Text editor for exact sciences with built-in KaTeX/AsciiMath support.

Finder

• Clipy - Clipy is a Clipboard extension app for macOS.
• Finder Go - A macOS app and Finder Sync Extension to open Terminal, iTerm, Hyper from Finder.
• OpenInCode - Finder toolbar app to open current folder in Visual Studio Code

Games

• Battle for Wesnoth - Turn-based tactical strategy game, featuring both single-player and online multiplayer combat.
• Boxer - The DOS game emulator that’s fit for your Mac.
• Dolphin - A powerful, Open Source emulator for Nintendo GameCube and Wii games.
• OpenEmu - Retro video game emulation for macOS.
• Screentendo - Turn your screen into a playable level of Mario.
• Stockfish - Beautiful, powerful chess application.

Graphics

• GifCapture - Gif capture app for macOS.
• Sketch Toolbox - A plugin manager for Sketch.app.
• Aseprite - Animated sprite editor & pixel art tool (Windows, macOS, Linux).
• macSVG - An open-source macOS app for designing HTML5 SVG (Scalable Vector Graphics) art and animation with a WebKit web view.
• InfiniteCanvas - Proof of concept Mac drawing application.
• ScreenToLayers for macOS - ScreenToLayers is a macOS application to easily capture your screen as a layered PSD file.

Productivity

• ClipMenu - A clipboard manager for Mac OS X.
• Karabiner - Karabiner (KeyRemap4MacBook) is a powerful utility for keyboard customization.
• Quicksilver - Quicksilver is a fast and free Mac OS X productivity application that gives you the power to control your Mac quickly and elegantly.
• SelfControl - Mac app to block your own access to distracting websites etc for a predetermined period of time. It can not be undone by the app or by a restart – you must wait for the timer to run out.
• Telephone - SIP softphone for Mac.
• Karabiner-Elements - Karabiner-Elements is a powerful utility for keyboard customization on macOS Sierra (10.12) or later.
• stretchly - stretchly is cross-platform electron app that reminds you to take breaks when working with computer.
• Whale - Unofficial Trello app.
• Ao - Elegant Microsoft To-Do desktop app.
• KeyHolder - Record shortcuts in macOS, like Alfred.app.
• Kiwix - Kiwix for iOS and macOS, build on Swift.
• Paperless Desktop - Desktop app that uses the paperless API to manage your document scans.
• AppGrid - Grid-based keyboard window manager for macOS.
• Yomu - Manga reader app for Mac OS X.
• Linked Ideas - A macOS application to write down and connect ideas.
• PSIBar - A quickly hacked up PSI OS X status bar app.
• Last Time - macOS app to show you the last time you have done something.

Notes

• Simplenote - The simplest way to keep notes.
• Boostnote - Boostnote is an open source note-taking app made for programmers just like you.
• tmpNote - Very simple macOS X app to make temporary notes.
• NoteTaker - A simple note taking app for macOS and iOS which uses Realm and CloudKit for syncing.
• Tusk - Tusk is an unofficial, open source, third-party, community driven, free Evernote app with a handful of useful features.
• FromScratch - FromScratch is a little app that you can use as a quick note taking or todo app.

Podcast

• Cumulonimbus - A simple, beautiful podcast app.

Sharing Files

• mac2imgur - A simple Mac app designed to make uploading images and screenshots to Imgur quick and effortless.
• Transmission - Official Transmission BitTorrent client repository.
• Rhea - A Mac status bar app for quickly sharing files and URLs.

Terminal

• iTerm 2 - iTerm2 is a terminal emulator for Mac OS X that does amazing things.
• Alacritty - A cross-platform, GPU-accelerated terminal emulator

Utilities

• AnyBar - OS X menubar status indicator.
• APNGb - macOS app which assembles and disassembles animated png files.
• BeardedSpice - Control web based media players with the media keys found on Mac keyboards.
• BitBar - Put the output from any script or program in your Mac OS X Menu Bar.
• ControlPlane - Automate running tasks based on where you are or what you do.
• DisableMonitor - Easily disable or enable a monitor on your Mac.
• EtreCheck - EtreCheck is an easy-to-use macOS app to display important details of your system configuration and allow you to copy that information to the Clipboard.
• Fanny - Monitor your Mac's fan speed and CPU temperature from your Notification Center.
• Finicky - Finicky - always opens the right browser.
• gfxCardStatus - gfxCardStatus is an open-source menu bar application that keeps track of which graphics card your unibody, dual-GPU MacBook Pro is using at any given time, and allows you to switch between them on demand.
• Helium - A floating browser window for OS X.
• Irvue - Screensaver for macOS.
• Kawa - A better input source switcher for OS X.
• KeepingYouAwake - Prevents your Mac from going to sleep.
• Loading - Simple network activity monitor for OS X.
• MacDown - Open source Markdown editor for macOS.
• Mackup - Keep your application settings in sync (OS X/Linux).
• MacPass - A native OS X KeePass client.
• Menubar Colors - A macOS app for convenient access to the system color panel.
• MenuMeters - A set of CPU, memory, disk, and network monitoring tools for macOS.
• Noti - Receive Android notifications on your mac (with PushBullet).
• ShiftIt - Managing windows size and position.
• SlowQuitApps - Add a global delay to Command-Q to stop accidental app quits.
• Übersicht - Keep an eye on what's happening on your machine and in the world.
• The Unarchiver - The Unarchiver is an Objective-C application for uncompressing archive files.
• WebTorrent Desktop - Streaming torrent app for Mac, Windows, and Linux.
• Satellite Eyes - Satellite Eyes is a small OS X application that sits in your system tray (next to the clock) and automatically updates your desktop wallpaper to the satellite or map view overhead.
• Turbo Boost Switcher - Turbo Boost Switcher is a little application for Mac computers that allows to enable and/or disable the Turbo Boost feature.
• AppPolice - An app for Mac OS X with a minimalistic UI which lets you quickly throttle down the CPU usage of any running process.
• Clean-Me - A small macOS app that acts as a system cleaner (logs, cache, ...).
• Shifty - A macOS menu bar app that gives you more control over Night Shift.
• Crypter - Crypter is an innovative, convenient and secure cross-platform crypto app that simplifies secure password generation and management by requiring you to only remember one bit, the MasterPass.
• Slow Quit Apps - An OS X app that adds a global delay of 1 second to the Cmd-Q shortcut.
• Balance Open - An app for all the world’s currencies.
• Clocker - Clocker is an OSX menubar utility designed to help you keep track of your friends in different time zones.
• Sloth - Sloth is an OS X application that displays a list of all open files and sockets in use by all running applications on your system.
• DatWeatherDoe - Simple menu bar weather app for macOS written in Swift.
• mirror-displays - A Mac app and command-line tool for fiddling with display mirroring: on/off/toggle.
• Appear - Appear your terminal programs in your gui!
• iOScanX - iOScanX (iOS Application Scanner for OS X) is a Cocoa application for semi-automated iOS app analysis and evaluation.
• Menubar Brightness - MacOS app to change the screen brightness on the menubar.
• Apple Juice - An advanced battery gauge for macOS.
• CaptuocrToy - A tool to capture screenshot and recognize text by online ocr apis.

Video

• HandBrake - HandBrake is an open-source video transcoder available for Linux, Mac, and Windows.
• Subler - Subler is an Mac OS X app created to mux and tag mp4 files.
• Subtitlr - Subtitlr is an open source OS X app used to find and download subtitles easily.
• MPlayerX - Media player on Mac OS X

Window Management

• Amethyst - Automatic tiling window manager for macOS.
• Hammerspoon - Staggeringly powerful OS X desktop automation with Lua.
• kwm - Tiling window manager with focus follows mouse for OSX.
• Phoenix - A lightweight macOS/OS X window and app manager scriptable with JavaScript.
• Spectacle - Spectacle allows you to organize your windows without using a mouse.

Mail

• gInbox - A Mac wrapper for Inbox by Gmail.
• Nylas Mail - The open-source, extensible mail client
• Rambox - Free, Open Source and Cross Platform messaging and emailing app that combines common web applications into one.
• Correo - A menubar/taskbar Gmail App for Windows and macOS
• Inboxer - Unofficial, free and open-source Google Inbox Desktop App.

VPN & Proxy

• Tunnelblick - Tunnelblick is a free, open source graphic user interface for OpenVPN on OS X.
• ShadowsocksX-NG - Next Generation of ShadowsocksX.
• SpechtLite - A rule-based proxy app for macOS.

Wallpaper

• Muzei - Muzei wallpaper app for macOS.
• OS-X-Wallpaper-Changer - Applescript for changing the Mac OS X desktop picture based on the time of day.
• BingPaper - Use Bing daily photo as your wallpaper on Mac OS X.
• Satellite Eyes - Mac OS X app to automatically set your desktop wallpaper to the satellite view overhead.
• Sunscreen - Sunscreen is a fun, lightweight application that changes your desktop wallpaper based on sunrise and sunset.
• WallpaperMenu - WallpaperMenu is a Mac OS X menubar application that navigates through beautiful pictures on the web and set them up as your desktop image.
• ArtWall - ArtStation set as wallpapers from https://www.artstation.com/artwork.rss.
• Image-As-Wallpaper - Utility application helps with selection of images for using as desktop wallpaper or in screensaver on Mac computers.
• earth-wallpapers - Simple Mac OS X menubar app which fetches latest photos from a subreddit.
• 500-mac-wallpaper - Simple Mac os app for the status bar to automatically download photos from 500px.com to a local folder that can be set as a source of wallpapers.
• Desktop Wallpaper Switcher - A Win / Linux / Mac OS tool for managing and cycling desktop wallpapers.
• pyDailyChanger - pyDailyChanger is a program that changes your wallpaper daily.
• osx-10.5-leopard-wallpapers - A copy of the wallpapers folder from an old installation DVD of Mac OS X 10.5 Leopard.
• BingPaper - Use Bing daily photo as your wallpaper on mac os x.

Others

• Aerial - Apple TV Aerial Screensaver for Mac.
• Catch - Catch: Broadcatching made easy.
• Clocker - macOS app to plan and organize through timezones.
• hacker-menu - Hacker News Delivered to Desktop.
• Sonora - A minimal, beautifully designed music player for OS X.
• SoundCleod - SoundCloud for macOS and Windows.
• Juice - Make your battery information a bit more interesting.
• Vienna - Vienna is a free and open-source RSS/Atom newsreader for macOS.
• Brave Browser - Brave browser for Desktop and Laptop computers running Windows, OSX, and Linux.
• Kap - An open-source screen recorder built with web technology
• ScreenCat - ScreenCat is an open source screen sharing + remote collaboration application.
• Toggl Desktop - Toggl Desktop app for Windows, Mac and Linux.