Windows 7 Manager
Windows 7 Manager is my favourite Windows 7 tweaker as it just does so much. Using the simple wizard and helpful guide, you can very quickly optimize, tweak, secure and cleanup Windows 7. It’s free for 15 days, which should be enough for most users.
More: Windows 7 Manager
Windows 7 Little Tweaker
Windows 7 Little Tweaker is a very small utility that lets you tweak some normally hard to get features within Windows 7 such as disabling low disk space warnings, speeding up thumbnail previews and turning off UAC prompts. 32-bit only
More: Windows 7 Little Tweaker
65MB in size, but comes with many options include registry and disk cleaning tools. EnhanceMySe7en works on 32-bit and 64-bit systems.
Gigatweaker tweaks Windows 7 and Windows Vista. Very fast with built-in Startup Manager and Uninstall Manager.
Recommended for the average user, without the huge amount of tweaks that most users don’t need. Features some interesting tweaks and a well designed interface.
More: XDN Tweaker
Ultimate Windows Tweaker
Very, very small at 345KB but still packs a lot in – over 150 tweaks and settings in fact. Works with Windows 7 and Vista, both 32-bit and 64-bit flavours.
More: Ultimate Windows Tweaker
Vispa is an excellent utility for tweaking Windows 7 and Windows Vista security settings. If you’re looking a very simple tweaking utility with literally on/off options, then Vispa is for you.