[ni-fi]

I've been using ccleaner's registry cleaner but i'm wondering if there's a better (free) one out there. any suggestions? thanks!

[Jungwon]

For Windows, there is no such thing as a "good" registry cleaner unless you do a nice fresh format.
CCleaner's Registry Cleaner is a temporary solution for those who do not wish to format but give them an option to "clean" up some gunk from their Registry database.
If you are using Unix, there is no such thing as a Registry :]