i3 - A dynamic tiling window manager designed for X11, inspired by wmii, and written in C.
Tynker - Game Worlds for Kids to Learn Programming
dwm - dwm is a dynamic window manager for X. It manages windows in tiled, monocle and floating layouts. All of the layouts can be applied dynamically, optimising the environment for the application in use and the task performed.
CodaKid - CodaKid is an online kid’s coding academy offering coding courses for kids, Minecraft modding, Robox coding, and video game programming courses.
Openbox - Openbox is a highly configurable, next generation window manager with extensive standards support.
CodeCombat - Learn programming with a multiplayer live coding strategy game.