Rosetta Code talk:Village Pump/Javascript Functionality Add
Language comparison script
http://rosettacode.org/wiki/User:Tyrok1/monobook.js
This script puts checkboxes next to each language in the ToC which can be checked to compare a number of languages. I chose to leave them underneath the ToC rather than floating them next to it due to the observation that many of the examples have fairly long line lengths, making side-by-side comparison rather difficult space-wise.
--Tyrok1 00:16, 20 May 2010 (UTC)