BitComet is a manager for web, FTP and BitTorrent downloads supporting simultaneous connections, file queue, selected torrent package contents, fast-resume, chatting, disk cache, speed limits, port mapping, proxy, IP filter etc.
The download includes both 32 and 64-bit versions.
Note: Many years ago, BitComet attracted a lot of critics due to its non-compliance with several standards. While still developed in China, most issues have since been resolved.