Tiny Tiny RSS is an open source web-based news feed (RSS/Atom) aggregator, designed to allow you to read news from any location, while feeling as close to a real desktop application as possible.
It is built with PHP, uses MySQL or PostgreSQL for storing data and makes use of the Magpie and SimplePie libraries (check PHP RSS Parsers) for fetching the feeds.

Features
- Server-side application, user only needs a web browser
- Supports RSS, RDF, Atom feeds using Magpie and SimplePie libraries
- Easy setup and configuration
- Streamlined interface using AJAX
- Free software, licensed under GNU GPL
- Authentication for reading protected feeds (e.g. LiveJournal friend-only posts)
- Supports feed aggregation, keyboard shortcuts, OPML import/export, multiple and single user operation, mobile devices, internationalization, detecting and filtering duplicate articles, podcasts, article scoring, content filtering, JSON-based API, Twitter feeds, feed sharing between instances, and more…
Requirements: PHP 5.2+ and MySQL or PostgreSQL
Website: http://tt-rss.org
Demo : http://tt-rss.org/demo/tt-rss.php
License: GPL License