One for the web nerds really this.

Ive written a content management system used by a few hundred garages to control their websites, but its only a fairly basic system.

Now that it has worked as a proof of concept, we're keen to move onto something a little more sophisticated with regards to uploading images and stuff like that in a nice slick interface, but at the same time it needs to be something we get the source code for and on a licence that allows us to alter the code.

Written in Java would be ideal, but not essential.

Anyone got any recomendations based on something they have actually used?

Cost isnt too much of an issue, providing its only 5 figures or less so it doesnt have to be free or anything like that.