Fine tune your PC !
Specific tools to change your system config, or just to do different things as take snapshots. Useful for who want to take a further step to make the perfect system.
Your system has lots of hidden / hard to access configs. With these applications, you make a lot easier to change settings !
Also, you will find tools that "help" you in doing what you do; for instance, take a screenshot of a region of your PC, to replace Windows copying system (to be able to pause, add / remove files, adjust speed...)