CCleaner - CCleaner cleans, speeds up and frees up space on business endpoints.
SD Maid - SD Maid is the perfect way to keep your mobile device in optimal shape by cleansing it of all the old data that clutters up the works. Inside the app, you'll find a number of advanced tools that will help you keep track of your files and apps.
AVG PC TuneUp - Peak performance for your PC. Keeps it going for longer. - More Speed Turbo Mode
Glary Utilities - The No. 1 Free, Powerful and All-in-one utility for cleaning your PC
CleanMyPC - A smart cleaning tool for a better-running computer.
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?