MultiSocial is a project mainly written in PHP and JAVASCRIPT, it's free.
A php project that collects and displays some RSS feeds
This project is a part of my personal website that I publish on github.
It fetches some RSS/ATOM feeds and publishes them on a dedicated HTML page, with a nice and clean design.
Feel free to reuse it.
See http://www.jblezoray.fr/multisocial/ for an exemple.