UNetbootin allows for the installation of various Linux/BSD distributions to a partition or USB drive, so it's no different from a standard install, only it doesn't need a CD. It can create a dual-boot install, or replace the existing OS entirely.
Initng is a full replacement of the old and in many ways deprecated sysvinit tool. It is designed to significantly increase the booting speed of a unix-like operating system by starting processes asynchronously.