DAZ Productions is offering a free copy of Bryce 5 (a popular commercial 3-D rendering program) on Download.com for a limited time. (I'm not sure how long, so grab a copy ASAP if you are interested.) It's a 24 meg download.
On Bryce 5:
Create breathtakingly realistic 3D landscapes and animations with DAZ Bryce 5. Striking an optimum balance between power and ease of use, this innovative software is an ideal way to integrate 3D technology into your creative process. Smooth network rendering saves valuable time by letting you render images on multiple computers. The Light Lab gives you robust control over lighting direction, and the Tree Lab ensures a more accurate depiction of real-world environments. Plus, an intuitive user interface simplifies the design process.
Download it via this link to Download.com. No rating on this one as the program is beyond my very limited artistic abilities.
Update: This free offer will end on September 6, 2006.