µTorrent (uTorrent) is a free BitTorrent client for Microsoft Windows written in C++ and localized for many different languages. It is designed to use minimal computer resources while offering functionality comparable to larger BitTorrent clients such as Azureus or BitComet. The program has received consistently good reviews for its feature set, performance, stability, and support for older hardware and versions of Windows. It has been in active development since its first release in 2005. Its name is commonly abbreviated "µT" or "uT".