Titanium Backup - Titanium Backup is a very old backup app that has been around since the early days of Android. In fact, it's one of the few apps that covers all versions from 1. Read more about Titanium Backup.
Link2SD - Link2SD is an application manager that makes it easy for Android 2.
Seedvault - A site about seeds!
App Mgr III - Move your apps to the SD card to free up space on internal memory.
Apps2SD - Apps2SD: Best app to move/link android apps to SD card, manage your device and boost performance - Link2SD, App2SD, Foldermount, Greenify, Busybox alternative.
Glary Utilities - The No. 1 Free, Powerful and All-in-one utility for cleaning your PC