Dungeon Crawl by AirConsole - Dungeon Crawl is a turn-based multiplayer adventure game that hearkens back to nineties fantasy board games.
ASCII Cats - Artwork created using keyboard symbols and characters
Galactic Crew - Galactic Crew is a roguelike sci-fi exploration game.
Star Trek Online - Star Trek Online (STO) is a free to play MMORPG that takes place inside the Star Trek world.
Tharsis - A turn-based space strategy game.
Crystal (programming language) - Programming language with Ruby-like syntax that compiles to efficient native code.