|A highly-configurable feature-rich front-end for torrent downloads|
- Upload and download speed management, including scheduling
- Supports UDP Trackers
- Can detect and import partially or fully downloaded files
- Can use IPV6
- Has a lot of plugins which extends its funtionality.
and many more. A longer list of features is available from Wikipedia.
You can search for torrents directly from KTorrent, instead of using a web browser. It has some engines already configured, and you can add more through.