Root required (this app won't root your device).
App Manager:
clear app data or app cache;
enable/disable (freeze) apps;
uninstall apps;
remove bloatware.
Flash Wizard:
install flashable zip files;
create flash queue for several zip files;
flash boot (kernel) images;
flash recovery images.
Init.d Emulator:
run scripts at startup;
no native init.d support required.
Build.prop Editor:
edit your ROM's build properties.
Advanced Reboot:
Standard or quick reboot;
Boot into recovery or bootloader (fastboot);
Boot into safe mode;
Restart system UI.
Miscellaneous tools:
ADB over WiFi;
enable/disable spell check;
mount system r/w;
change system language.
Widgets:
Task Cleaner;
Advanced Reboot.