This userscript detects links to Stack Overflow when you Google something and shows the accepted/most-voted answer directly in the search page!
To install, you'll need a userscript manager such as Tampermonkey or Greasemonkey.
Install script from here, or view the source here
I aim to make it look a bit better when I get a bit more time, and fix a few bugs. Please post bugs as answers here :)