Free is usually thought of as not good. The 3D downhill skiing game called ORF-Ski Challenge 07 is one of the exceptions.
The new Ski Challenge 2007 features a couple improvements over the 2006 version, the most important one for non German speakers being English menus and English documentation.
The game uses real 3D data of World Cup downhill tracks like Groeden, Bormio, Wengen and Kitzbühel, which contributes to its high level of realism. Besides, if you register a username your time is listed in the central online ranking.
Ski Challenge is highly addictive, because it is fast and easy to play. Have fun!