1.It can list all the apps in the system.
2.It can filter the app you want to use instantly.
3.It can uninstall useless system app (need root permission). The system apps uninstalled will be backed up in SD card, and you could recover them anytime you want.
4.Just click the app to uninstall it, and long press the app to run it.

PDF Utility - Lite is very comprehensive tool to perform various operation on pdf file.
-Split the pdf file at specific page.
-Merge many pdf to one pdf
-Extract Images from pdf
-Overlay pdf files
-Encrypt(password protected) pdf