µTorrent is an efficient and feature rich BitTorrent client for Windows sporting a very small footprint. It was designed to use as little cpu, memory and space as possible while offering all the functionality expected from advanced clients.
Download : µTorrent 1.8 Build 10198 Beta

Download Accelerator Plus is a file download accelerator manager (Up to 300% Faster). Multi-Server connections for best performance. It can also recover from lost connections, computer shutdowns and other errors. The program can also search for mirror sites to maximize your download performance. It is fully integrated into the browsers, supports proxy servers, auto-hang-up after download completion, and much more.

Download : Download Accelerator Plus 8.6.6.0 Beta