Autosize

Name: Autosize
Homepage: http://www.jacklmoore.com/autosize/
Description: Some tools are so intuitive and useful that you don't even notice them, but you'd certainly notice if they weren't there. Autosize is one of those: it's a simple little drop-in for jQuery that makes big text-entry boxes (like the ones you see all over Querki when you are editing) silently resize themselves if you type more than will fit.