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.
CCleaner - CCleaner cleans, speeds up and frees up space on business endpoints.
ZEEEN - A beautiful iPhone app for browsing Dribbble
Clean Master - Some users swear by it, some call it a glorified snake oil that does more harm than good. That can be said about any snake oil, but what specific brand of snake oil can boast almost a billion downloads around the world?