I have a fairly large site that offers software reviews and downloads but the software that it is using is really old and needs a fresh start. I am looking for a software built in PHP that could get me headed in the right direction. I have seen sites like (http://www.filehippo.com/download_firefox/) and they seem to do a good job of organizing software. Ultimately, this is what I am looking for... Here are a few things that I would like to get in the software package - tagging - screenshots - rating - versioning - SEO