gvSIG is the platform where are migrating my contributions to GIS, thanks to Hydrologis. It is my intention, obviously, to embrace it from version 2.3, hoping that this will be the home sweet home I deeply desired in the last years. In preparing the arrival of the version that contains my tools, the developers had the idea of a nice initiative called gvSIG Festival where many developers were asked to explain their work.
There you can find a lot of useful information. Not specifically about hydrology but someone are. Clicking on the figure you will access the main page. Video Presentations are here.