MoonlightTorrent, most BT clients out there were large Python/Java clients.
Editor: At the time I started writing MoonlightTorrent, most BT clients out there were large Python/Java clients that used lots of RAM and a fair amount of extra CPU time. Writing a native Win32 client seemed like a neat idea since I would get to try out a few programming tricks and had loads of spare time at that moment. Since there were few to no other C/C++ clients back then, most existing clients did not have the feature I wanted and I also had a shot at putting together something that could become popular, I thought I might as well get started while I had some spare time. you can free download MoonlightTorrent 0.2.0.0 now.