While trying to convert some .3gp/.amr files that I recorded from my mobile phone, I struggled to find a way to convert the files to a regular more desktop format (such as .mp3). Enter YouConvertIt. The site is pretty cool. You upload a file, give it what you want the output format to be, and poof, it’ll email you the converted files. It’s a bit of a Swiss Army Knife and since it’s a web app you don’t need to install anything on your computer. Cool and useful site.