Magical Jelly Bean Keyfinder - The Magical Jelly Bean Keyfinder is a freeware utility that retrieves your Product Key (cd key) used to install windows from your registry. It also has a community- updated configuration file that retrieves product keys for many other applications.
SDelete - Securely overwrite your sensitive files and cleanse your free space of previously deleted files using this DoD-compliant secure delete program.
Mac Product Key Finder - Mac Product Key Finder is a simple tool for recovering lost product keys for mac applications.
CCleaner - CCleaner cleans, speeds up and frees up space on business endpoints.
Recover Keys - Recover Keys is product keyfinder program which can recover lost product keys for Windows 8, 7, 10, Office, Exchange, Adobe Photoshop and many-many more.
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?