I found the tool Timeline from Pixel Novel, but I wondered if I could use any subversions app to manage my design files. I’m not sure to understand everything about Subversions yet, and I did not found a lot of information about his usage in the design field.
Not sure how well it works with data compression, but you may want to give git annex a try: http://git-annex.branchable.com
If your files aren’t so big, plain git or mercurial may be the best fit. Just avoid SVN at all costs