A one-button Google+ game about climbing as high as you can.
A minimal but functional NES emulator written in Go.
A web game about building things with toy blocks.
An iPhone game with an accelerometer twist on Connect Four. (trailer)
A game of peg solitaire as a Java applet.
An award-winning, multiplayer version of the ancient Norse board game of Hnefatafl. (source)
A random maze generation experiment using Eller's algorithm.
A python/pygame implementation of Tetris.
A tiny, statically-typed, type-inferenced language.
A dead-simple Brainfuck-to-x86-assembly compiler.
A real-time microkernel x86 operating system and Marklin train control program.
The long tail of long-forgotten bits.