Screenshot / Code Snippet
MinimalOverflow was written to deal with a request which Jeff Atwood put forward in the MSO Tavern on Friday, February 25, 2011. Someone on Physics.SE asked if it would be possible to get the theme changed to black on white, an inverse of the current white on black. Jeff decided it would be good to have a generic "destyled" theme for all Stack Exchange sites.
This script is my answer to Jeff's request. MinimalOverflow adds a link to the top navigation bar which allows users to toggle between any given Stack Exchange site's theme and a "clean" theme.
MinimalOverflow doesn't really have a license. Attribution is nice, but not required. (Jeff - I'll take you up on that t-shirt though. ;-D)
You can download the usertheme by installing the user script which injects the theme switcher into the page. The user script is available on my GitHub page: MinimalOverflow on GitHub. Please note that if you have installed a version prior to 0.1.5.0 then you will need to manually uninstall the old one or they will conflict.
This script was created by Moshe Berman. You can reach him at moshberm AT gmail. Special thanks goes to @YiJiang and @TimStone for helping with Firefox support.