Registry Robot provides a safe interface to dozens of registry settings that cannot be changed through built-in Windows utilities. Only tweaks that relate to your operating system or Internet Explorer version are displayed; if it's not relevant, you never see it. The tweaks appear in a tree structure, organized by category, and include descriptive text so you know what the effect of each one will be. And if you don't like the result of a tweak, you can easily undo it. [PCWeek]