CCleaner!

BleachBit deletes unnecessary files to free valuable disk space, maintain privacy, and remove junk. Rid your system of old clutter including cache, cookies, Internet history, localizations, logs, temporary files, and broken shortcuts. Designed for Linux and Windows systems, it wipes clean Adobe Reader, APT, Bash, Beagle, Chromium, Epiphany, Firefox, Flash, GIMP, Google Chrome, Google Earth, Internet Explorer, Java, KDE, OpenOffice.org, Opera, RealPlayer, Safari, Second Life viewer, Skype, VIM, XChat, Yum, and more. »

Glary Utilities offers numerous powerful and easy-to-use system tools and utilities to fix, speed up, maintain and protect your PC.

Clean Master is an all-in-one cleaner app on Android for cleaning app cache, unused files, residual files, search history and uninstalling apps. With this apps user can also Kill running Tasks and releases more RAM to boost your phone performance and save battery life without granting superuser permission.

CleanMyMac scans every inch of your system and safely removes gigabytes of junk in just two clicks. Free up storage on your Mac and boost its performance — CleanMyMac finds 74 GB of junk on an average computer.

Remo MORE provides "One Click Maintenance" feature to clean up junk files, fix issues and speed up your devices with a simple click. You can automate this process and maintain your devices on daily basis without any intervention. Remo More comes with 30+ functionalities to Manage, Optimize, Recover and Enhance your PC, Mac and smartphones. Remo More offers best user experience by providing simple and easy-to-use user interface.

This is a powerful tool! Use at own risk!Nobody is perfect and Android neither.Apps you have already deleted, sometimes leave data behind.The system constantly creates logs, crash reports and debug files you don't really need.Your SD-card is collecting files and directories you don't recognize.Lets not go on here...

OnyX allows you to verify the Startup Disk and the structure of its System files, run miscellaneous tasks of system maintenance, configure some hidden parameters of the Finder, Dock, Dashboard, Exposé, Safari, Login window and some of Apples own applications, it deletes caches, removes a certain number of files and folders that may become cumbersome and more.

FSlint is a utility to find and clean various forms of lint on a filesystem. I.E. unwanted or problematic cruft in your files or file names. For example, one form of lint it finds is duplicate files. It has both GUI and command line modes.

Advanced SystemCare, all-in-one PC optimization utility, specializes in ONE-Click solutions to detect, clean, repair, speed up and eventually protect PC. This "must-have" tool is 100% safe with no adware, spyware or viruses. To better protect users' online privacy with Advanced SystemCare Free 8, "Protect" tab is newly added, which is design to provide quick access to protect browsing from being tracked by automatically cleaning privacy traces once browser closed and detect and resist the attack of malicious plug-in/toolbar by Browser Anti-Tracking and Plug-in/Toolbar Cleaner in this tab. »

Wise Registry Cleaner scans the Windows registry for invalid or obsolete information and presents you with a list of potential problems. To help you decide which items to delete, the program classifies them as "Safe to fix" or "Not fully safe to fix".

Wise Disk Cleaner is a quick and safe junk file cleaner. The advanced scan engine will quickly locate junk files in your system and remove them safely. By deleting temporary and junk files, it increases available disk space and improves your system performance.

PrivaZer is a free PC cleaner and privacy tool which cleans in-depth unwanted traces of what you've done, watched (videos, movies), downloaded with your PC See exactly what can still be recovered of your past activities on your PC at home or at work Clean in-depth unwanted traces of what you've done watched, downloaded, deleted, etc. Prevent recovery

System Mechanic automatically repairs errors and fragmentation, cleans out clutter, and tunes up your PC -- so that it runs smoothly, reliably, and up to 300% faster! Don't waste money on expensive "experts" to fix your PC when System Mechanic will repair, tune, and maintain it for you!

Click&Clean is a free, fast and easy-to-use extension for Google Chrome and Mozilla Firefox that can be used as a powerful private data Cleaner.