1. Open Command Window Here Power Toy

This will help programmers or those who uses command line frequently. This adds an "Open Command Window Here" context menu option on file system folders.

2. Alt-Tab Replacement Power Toy

With this  in addition to seeing the icon of the application window you are switching to, you will also see a preview of the page. This helps particularly when multiple sessions of an application are open. Also a cool window to display ;)

Check them here