ein Werkzeug, mit dem sich Weblog-Artikel schreiben und verwalten lassen; unterstützt werden u.a. WYSIWYG, Foto-Upload, Tagging und die Plattformen Blogger, LiveJournal, TypePad und WordPress. (via screencasting.de)
CommentPress is an open source theme for the WordPress blogging engine that allows readers to comment paragraph by paragraph in the margins of a text. Annotate, gloss, workshop, debate: with CommentPress you can do all of these things on a finer-grained level, turning a document into a conversation. It can be applied to a fixed document (paper/essay/book etc.) or to a running blog.
DiSo (dee • soh) is an initiative to facilitate the creation of open, non-proprietary and interoperable building blocks for the decentralized social web.
WordTwit is a plugin that utilizes the Twitter API to automatically push a published post to your Twitter account as a tweet, using the blog domain as a short URL.
BuddyPress is a suite of WordPress plugins and themes which extends WordPress MU and brings social networking features to a new or existing installation.
Create more than just blog posts and pages. Add new content types with only the fields you need. Customize exactly how each content type's list and detail pages appear.
All of these tutorials range from basic learning for the beginner, to advanced for the expert who wants to learn new techniques. Basically everyone can take something from these tuts.