AVG 8.0 free has anti-spyware built in. 
I wonder how effective that is. AVG is primarily an anti-virus program, so even if it has such a feature, the creators spent less time with it. If I used any anti-spyware, I would use a program that does only that.
Besides, I also think being careful in what I download is the best way to keep my comp safe.
Grisoft had two products: AVG Free Edition 7.5 and AVG Anti-Spyware 7.5 Free Edition. They are now merged with the 8.0 release.

(I used to run both on my machine.) BTW, you should know that it's pretty hard to find AVG Free Edition on their site... helps to know the direct link,
http://free.grisoft.com .
