gRSShopper is an application that allows you to define your own community of RSS feeds, aggregates content from those feeds and organizes it, and helps you integrate that content into your own posts, articles and other content.
twitter2rss will obtain all friends of a specified twitter account, and then create an OPML feed list. The feed list will contain all of the obtained friend's twitter RSS feeds, which can then be imported into any standard feed reader.
RSS aggregator written in python, using django. Feeds and feed items can be annotated with tags and other information from services such as twitter & delicious. Allow communities such as teachers to get focused, useful information from the interweb.