Mac OS Developer Tools
If you want to reclaim tens of gigabytes of your storage used for various Xcode caches - this tool is for you!
Xcode could store tens of gigabytes in ~/Developer folder. Most of those cached files & symbols is not reclaimed over time and could consume a large amount of your storage, which is especially important if you have relatively small SSD drive.
Xcode Cleaner gives you an easy way to inspect auto-generated files and clean them if necessary. It could also remind you about scan after a while.