IDENT (RFC-1413) Server for Windows XP and 2003. This ident server can be installed as a service or run from commandline. It uses XP IP helper API to locate process that initiated tcp connection, therefore it works well in multiuser environments.
IrcManager is a commandline tool for Linux that can download files from xdcc bots.
Only active dcc transfer is supported. Server password and channel password are not supported at this point.