Horde3D

Dev
HeroEngine
HeroEngine is an all in one game development engine. The only game engine that allows real time updates and collaborative development no matter where your developers are located at in the world.
OGRE
PlayCanvas
Collaboratively build stunning HTML5 visualizations and games
Solar2D
Solar2D - Awesome 2D game engine
Spring RTS Engine
UNIGINE - real time 3D engine
Felgo
Create mobile apps, desktop, embedded & web applications, with the free Qt-based Felgo framework, development services, consulting & training.
Tabby - a terminal for a modern age
Tabby is a free and open source SSH, local and Telnet terminal with everything you'll ever need.
OnionShare
Unreal Engine | MetaHuman Creator
Create photorealistic digital humans, fully rigged and complete with hair and clothing, in minutes.
Stride Game Engine
Stride is an open-source MIT C# game engine designed for the future of gaming.
CRYENGINE
The complete solution for next generation game development by Crytek
GDevelop.io
GDevelop is an open-source, free, and easy game-making app. Find game development tutorials, publish to Android, iOS, and more.
Meson Build system
pump.io
tmux/tmux · GItHub
tmux source code. Contribute to tmux/tmux development by creating an account on GitHub.
Ampache - Music Streaming Server
A web based audio/video streaming application and file manager allowing you to access your music & videos from anywhere, using almost any internet enabled device.
Guake Terminal
KDE Konsole
Konsole: the KDE Terminal Emulator
Universal Media Server
Stream your media to your devices, whether they are TVs, smartphones, gaming consoles, computers, audio receivers, and more!
OSMC - Open Source Media Center
OSMC is a free and open source media center built for the people, by the people.
Gerbera
Gerbera - A free media server. Stream your media to devices on your home network: Home Page
Jellyfin - The Free Software Media System
Source-code: https://github.com/jellyfin/jellyfin
Plex.tv - Stream movies and TV shows
Plex is a one stop destination to stream movies, tv shows, sports & music. Check good movies to watch on Plex and stream all your personal media libraries on every device.
Neuron Themes
Create outstanding and complex WordPress websites using the advanced set of tools and features that Neuron Themes provides. Be your own designer.
Snowtrack.io
Oh My Zsh
Oh-My-Zsh is a delightful, open source, community-driven framework for managing your ZSH configuration. It comes bundled with several helpful functions, helpers, plugins, themes, and a few things that make you shout... OH MY ZSH!
TWiki
A leading Enterprise 2.0 collaboration platform with 400+ extensions, used by 50,000 businesses, maintained by an active open source community for 10+ years.
uCalc
The builder of online calculators uCalc allows you to quickly build a calculator to estimate the costs of business services of any complexity.