FreshRSS is a self-hosted RSS feed aggregator such as Leed or Kriss Feed. It is at the same time lightweight, easy to work with, powerful and customizable. It is a multi-user application with an anonymous reading mode. It supports custom tags, and PubSubHubbub for instant notifications from compatible Web sites. There is an API for (mobile) clients, and a Command-Line Interface. Finally, it supports extensions for further tuning.