Web-based dynamic system modeling tool for online nonpoint pollution, hydrology, and water supply planning. Supports HSPF, CEQUAL and GWLF. Web Hydrology Object model is object oriented, with user definable equations, linkages and remote data queries.
Sage is a web-based stats system for your Folding@Home team. It is light, fast, and based on PHP and an assortment of SQL-based database management systems, so it is ideal for webservers.