Folder size analyzer

I know other programs exist that do this kind of thing (e.g. VisDir), but it would be nice if I didn't have to use that alongside CCleaner. I sometimes think it's helpful to find and remove junk files if I can see visually which folders contain a lot of data. They may not necessarily be cache or temporary files, ones that I can program CCleaner to remove, but they might be some files I no longer have a use for and are wasting space.

But say this feature is never added, it would be nice if I could list other programs under the "Tools" section and launch them from there.