Portable torrent clients..

So I'm looking for some other options here besides the obvious utorrent and bitcomet, as I'm forced to use computers which have an admin who is intent on blocking every torrent client he finds me using..

Anyone know of any others?

I tried the Wyzo firefox plugin as it appears to be the only somewhat mature client for FF that doesn't require the installation of software that requires admin privs, but it seems pretty braindead compared to utorrent and especially bitcomet speeds..