G2C (Geospatial to Civil)
The LandGML Interoperability Experiment initiated by Autodesk, U.S. Army Corps of Engineers Engineering Research and Development Center, and Galdos Systems. this open source tool transforms LandGML into LandXML documents.
iHailStorm Bulletin Board (aka Inca Forums) is a very fast, powerful, and a very user friendly message board written in php. Designed from the ground up to have powerful community support, iHS supports groups, usergroups, RPG stats, and much, much more.
A mod_perl-based RPC API designed for ease of setup, ease of extension, and rapid development.
Using Presto, you can develop a robust, fully "web-2.0" web application in a day or two.
Oh and it scales.
Take that, Ruby on Rails.