1. CallFilter. This application allows you to block unknown calls and calls from the numbers registered on the blocking list.
2. NetCounter. Is a network traffic counter for the Android platform.
3. ES File Explorer.Free,Featured File manager & Appmanager & taskkiller which explores the phones
4. TurboList is THE simple list manager. Keep more than one list. Use it for To Do, Grocery, and all your other lists. Use voice recognition to dictate new lists!
5. TasKiller, let you close (kill) your running applications in one click. You can also switch between apps.