Digibuzzer

Access and share your files, calendars, contacts, mail and [more](https://apps.nextcloud.com/) from any device, on your terms.

Factorio-like tower defense game. Build production chains to gather more resources, and build complex facilities.

Ad-less chess server powering lichess.org, with official iOS and Android client apps.

Voxel game engine (formerly Minetest). Play one of our many games, mod a game to your liking, make your own game, or play on a multiplayer server.

An open source voxel game engine. Play one of our many games, mod a game to your liking, make your own game, or play on a multiplayer server.

Minimalist text adventure game for your browser.

Transport tycoon simulation game.

The Battle for Wesnoth is an Open Source, turn-based tactical strategy game with a high fantasy theme, featuring both singleplayer and online/hotseat multiplayer combat.

Unique puzzle game designed for geeks and developers, where you solve the puzzles in the game by reading and writing Javascript.

Cross-platform real-time strategy game of ancient warfare.

SOGo offers multiple ways to access the calendaring and messaging data. CalDAV, CardDAV, GroupDAV, as well as ActiveSync, including native Outlook compatibility and Web interface.

Add network play functionality to Rockstar North's Grand Theft Auto game series, in which this functionality is not originally found.