TwitBox is a Windows client for interacting with the Twitter service rather than having to deal with the web interface for it. The best windows twitter desktop app so far. Better than anything on the Mac also.
NetDraw is a program for drawing networks. It uses (or will use) several different algorithms for laying out nodes in 2-dimensional space (3D will come later). Netdraw reads UCINET system files, UCINET DL text files, and Pajek text files (.net, .clu and .