Java code katas.
A generic build-server system-tray notifier using the system tray functionality of Java SE 6.
Scala code katas.
PHP code katas using PHPUnit.
Code as finally developed during the "TDD as you meant it" workshop @ GeeCON 2012.
Braithwaite's Measure (downloaded from http://www.keithbraithwaite.demon.co.uk/profess...)
Forth code fragments and code katas to learn Forth.
Eclipse Keystrokes Recorder