Original tigsource thread here.
Portile is a 2d, tile-based take on narbacular drop (more than portal, because I’ve not played portal, and from what I understand momentum plays a big part in portal, and it doesn’t play any part in this).
Portile V0.3 (466KB, for Windows)
Portile V0.3 (610KB, for OSX 10.5* [ note – doesn’t work in the latest versions of OSX :( ) )