My free Windows tool "RAR File Open Knife" has been reviewed and recommended by a lot of download archives over the last few weeks and it has won over 20 5-star awards:
RAR File Open Knife (1.4MB) is a tool that opens RAR archives. As fast as possible. The program comes with short instructions in over 50 languages, the engine is highly optimized. In performance tests RAR File Open Knife was up to 11% faster than 7-Zip etc.