Any suggestions for a bittorrent client on Android ?

[kbf]

I am looking for a bittorrent client, which will run on my cell phone, dowload files onto the sim card. If at all possible, I'd like it to be robust (i.e. not crashing every few megabytes of download) and most importantly free.

Any suggestions ? Our phones are Droid 2 and Droid 2 Global on unlimited data plan.

Thanks