jTransProx - a transparent infection proxy implementation in java (soon on github)
6torrent - a java bittorrent client/lib
transprox - a transparent proxy with on-the-fly data manipulation (C implentation)
If you want to contact me please visit our IRC-Channel: #nullserv / #sixserv @ freenode.net
Or send me a mail to: nks@sixserv.org
For Jabber/etc please talk to me in IRC.