puredata using the firefox web api

visual scripting language built into unreal engine

drag n' drop game maker, uses python for the underlying scripting language.

building computers in garrys mod, a mod for halflife 2.

headless / interface less pd for iphone, wrapped up in a music player style application. Rocking out to some serious delay effects right now.

simple online gamemaker, flash based, community system.

node based system for developing procedural textures and vertex shaders, cross platform, java.

visual programming language for creating 3d worlds

Lily is a browser-based, visual programming environment that lets people create programs graphically. JS based max/msp thing, can pass OSC, play back embeds, etc. etc. pretty impressive