Is there a program for the Mac similar to Tune up Utilities for Windows? Been having a look around but couldn't find an awful lot, I'm hoping you guys will have a couple suggestions!
You really have no need for such software on a mac. But if you need a program to remove old cache files then i would try Onyx. Its free and does a great job. Plus it has a bunch of other features included also.
If you want to see what files are taking up the most room i would try an app called GrandPerspective. Its free and shows you a visual representation of the size of your files.