There are many applications that automatically start when you turn on your device; many of these you don't use or need, they just consume your valuable resources. Autorun Killer lets you manage applications that start up when you boot your device. Donate version even tries to prevent their restart (and is ad-free).

AutoKiller is an award winner minfree tweaker, it fine tunes android's inner memory manager to keep your device fast and lowers battery consumption. Also includes a manual process/service manager.