Using RhNav - Rhizome Navigation I wrote a data aggregator for Technorati's API. The first result is a video which visualizes blog domains by analysing Technorati's Cosmos (the blogs which link to a particular URL). The video is a screencast of RhNav fetc
TANAGRA is a free DATA MINING software for academic and research purposes. It proposes several data mining methods from exploratory data analysis, statistical learning, machine learning and databases area.
L. Dini, and G. Mazzini. Proceedings of the Conference on Data Mining Methods and Databases
for Engineering, Finance and Other Fields (Data Mining), page 299--310. (2002)