sux0r is a blogging package, an RSS aggregator, a bookmark repository, and a photo publishing platform with a focus on Naive Bayesian categorization and probabilistic content. It is OpenID 1.1 enabled; as both a consumer and a provider.
Makagiga is an easy-to-use, portable application for doing a variety of tasks, such as todo listing, text editing, or RSS reading. Plugins are used to implement its various capabilities.
Edo is a cross platform utilty application. It aims to replace a lot of small tools you have to use daily, like a network enabled notepad, RSS reader, audio player, IM client, and others.
LeechCraft is a modular Internet client. It allows you to browse the Web; read RSS/Atom feeds; download files via BitTorrent, FTP, and HTTP; automatically download, play, or stream podcasts (and other media files); and much more.