83Plus:Software:Diffequ
From WikiTI
Diffequ is a differential equation grapher for the TI-83/84 Plus developed by Martin Warmer, originally through the 2006 Google Summer of Code.
Source code is available at the sourceforge project via its SVN repository. A build of the code at the end of the Summer of Code is available here. To enable diffequ mode run the application once, to disable it run the application another time. Warning: this build is not tested very well and can crash your calculator!
