Xslimmer - Your Mac on a Diet With Xslimmer - Universal Application Slimmer for Mac OS X 10.3 and up.
CCleaner - CCleaner cleans, speeds up and frees up space on business endpoints.
iMobie MacClean - MacClean 3 is your all-in-one Mac app, allowing you to maintain OS performance, keep privacy safe, free up space on Mac, and best of all, keep away from any malicious threats.
Wise Disk Cleaner - Clean junks of Browsers, remove junk and useless files of Windows and Defragment your disk. Wise Disk Cleaner can delete these unnecessary files on your hard disk to free up disk space and make your computer run faster.
ZEEEN - A beautiful iPhone app for browsing Dribbble
CleanMyPC - A smart cleaning tool for a better-running computer.