StatusNet is a microblogging platform. A StatusNet site is a lightweight social network that helps a community, company, or group to exchange short messages, files, and data over the Web. Users can choose which people to "follow" and receive only their friends' or colleagues' status messages. It provides a service that is similar to Twitter, Yammer, SocialCast, or Salesforce.com Chatter.
Blue Smiley Organizer is a Web-based script to manage your bookmarks, diary, reminders, to-do lists, contacts, knowledge, and file upload in a multi-user environment. It also includes its own live support help system, blogs, RSS feeds, customizable themes, and a discussion forum.
CMME (Content Management Made Easy) is a Web content management system that aims to be easy to use, doesn't have many requirements, and is still reasonably flexible. It doesn't need a database, doesn't have extensive administrative needs, and works more or less like a wiki. New pages can be made on the fly, rather than through an administrative page.
WordPress is a state-of-the-art, semantic, personal publishing platform with a focus on aesthetics, Web standards, and usability. It was born out of a desire for an elegant, well-architected personal publishing system. While primarily geared towards functioning as a Weblog, WordPress is also a flexible CMS capable of managing many types of Web sites. In addition to the basic blog functions, it also has an integrated link manager, categories, tags, custom taxonomies, file attachments, XFN support, support for stand-alone pages, Atom and RSS feeds for both content and comments, blogging API support (Atom Publishing Protocol, Blogger, MetaWeblog, and Movable Type APIs), spam blocking features, advanced cruft-free URL generation, a flexible theme system, and an advanced plugin API.
SimplyBibTeX is an application to share and hold BibTeX bibliographies. One can add, edit and remove entries from bibliographies online or upload complete collections. The system uses a very simple but effective template mechanism. Users and coworkers can subscribe to RSS 2.0 or Atom feeds in order to get notified about changes.
sadlittlewebjournal is a Weblog written in Perl that utilizes PostgreSQL or MySQL and a straightforward ASCII interface. Site maintenance is done via an intuitive backend that allows one to add, delete, and modify previous entries. Other features include an integrated guestbook, a Web stat chart complete with ASCII bar graphs, and various other modularized features.
ZebraFeeds is a Web-based RSS/Atom aggregator. It can be integrated into your Web site or blog with minimal effort and a high level of customization. You can also use it as a personal Web-based news aggregator with a reasonably convenient user interface inspired from modern aggregators.
VStarBlogEngine is a lightweight multi-user/single-blog engine intended for bloggers who need a simple, fast, and reliable blogging platform. It is built as an alternative to existing heavily-armored blog engines, such as Wordpress, Drupal, and others. It features fast and secure blogging, quick threaded commenting with CAPTCHA, multi-language support with UTF-8 database encoding, subscription to comments, tags support, spam filtering, RSS support, LiveJournal cross-posting, and Wordpress database import. It does not feature self-registration, OpenID, a visual editor, plugins, widgets, etc.