Terror the micro aggregator
Terror is a micro feed aggregator made with sinatra and bundled as a gem. It's very simple to use, just install the gem:
gem sources -a http://gems.github.com
sudo gem install gravityblast-terror
Create a new project
terror new_aggregator_name
cd new_aggregator_name
Start the server
thin start -C config/thin.yml
Run the feeds fetcher
rake feeds:fetch # run it as a cron job
You can browse the source and fork it on github.