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.
Xslimmer - Your Mac on a Diet With Xslimmer - Universal Application Slimmer for Mac OS X 10.3 and up.
SDelete - Securely overwrite your sensitive files and cleanse your free space of previously deleted files using this DoD-compliant secure delete program.
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.
Avast Cleanup - Next generation tuneup and cleanup for your PC
ZEEEN - A beautiful iPhone app for browsing Dribbble