JAVIER is a JAvascript Voicexml InterpretER, designed (but not restricted) to run inside a web browser, its main engine has less than 1000 lines of code. It's maybe, the tiniest but (almost) FULL VoiceXML implementation.
GAEM stands for Graphical Adventure tiny-Engine for Mobiles. Its main use is to read some text files and images and generate the game. It's being developed in J2ME under CLDC/MIDP environment.