CTorrent DNH221,
http://www.eros2.info/download/ctorrent-dnh221.zip :
" Features
The purpose of the Enhanced CTorrent effort is to fix problems that
remain in the code, modernize existing features and algorithms, and
implement new features while maintaining low overhead requirements and
a high standard of performance (both part of the original CTorrent
design philosophy). Highlights of the enhanced client include:
* Support for large files (>2GB) and large torrents (>255 files)
* Strategic selection of pieces to request for download
* Continuous queueing of download requests, tuned based on latency
and throughput for each peer
* Improved download performance, including parallel requests in
initial and endgame modes
* Improved bandwidth regulation
* Improved compatibility with other peers
* Performance optimization and bug fixes
* An interface for monitoring and managing multiple clients"