Convert convert convert
If you often like me is needing the oppurtunity to convert one format to another, you’ll most likely love this site
http://www.online-convert.com/
In here you have options to convert images, audio, movie, compressed files etc. to another format.
If you however need on a more regular basis, I strongly recommend https://keepvid.com/ it is an easy to use utility, that really gives value for money. Furthermore it offers a plugin for Chrome, IE and Firefox if you really need a download station.