Some users don't root their devices or, even if rooted, some stock kernels don't includes support for init.d scripts folder.
With this simple app you can define a folder (at sdcard) containing all your initialization scripts and execute it after the boot sequence.
Note that some scripts (like the scripts needed to set min/max CPU speed) needs root permissions.
Operation is very simple, and you only need to select the scripts folder and activate the "run on boot" checkbox.
Note that you can provide superuser permissions to the scripts if you will.