µTorrent
In march I dropped Azureus and switched to µTorrent after a friend told me about it. This first big differencee I noticed was its tiny memory use. Instead of using Azureus's 60MB, it used 6MB. This is important on my memory-cramped server, becausee I also run IIS, SQL, DNS and file servers. Another useful feature is the podcast downloader, a feature which Azuereus is lacking (yes, I know about the various podcast downloadextensionss for Azuerus, but none of the have all the features I need). Interestingly, several cool are also now using µTorrent: Carl Franklin, Richard Campbell, Dax Pandhi.