Windows XP with a WindowBlinds skin applied
Windows Vista with Leo WindowBlinds skin applied
Windows XP with Aero Diamond applied
Thanks to years of optimization, WindowBlinds not only won't slow down your computer, it is faster than Windows XP or Windows Vista is by default thanks to making use of video acceleration features in ATI, nVidia, and Intel-based video adapters. Moreover, WindowBlinds makes heavy use of resource sharing and as a result typically uses less memory than when using the default Windows XP or Windows Vista visual styles.
WindowBlinds 6.02 is a maintenance release designed fix some reported bugs, improve skin changing speed, and add support for MyColors themes.
WindowBlinds is a free download at http://www.windowblinds.net. Users can purchase an enhanced registered version which adds additional functionality for $19.95 (or get it as part of Object Desktop which adds several additional programs and costs $49.95)