ZDbox (Root Task Killer) - ZDbox (Root Task Killer) is a rich-featured tool which is developed by ZDworks, allowing you to speed up and boost up the performance of your device, making you save more battery or time.
Avira - Cloud based email security solution
Task Killer - Task Killer is an application which automatically forces other applications to stop which are running in the background, making you enhance your smartphone performance and battery life.
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?
Advanced Task Manager - End applications, speed up phone, and save battery.
CCleaner - CCleaner cleans, speeds up and frees up space on business endpoints.