BitlBee allows users to talk to people on the major instant messaging and microblogging networks (including MSN, Google Talk, AIM, and Twitter) from within any IRC client by emulating an IRC server. Virtual channels are created with all of the user's contacts in them, who can be talked to in the channel or in a query. Also, one can participate in group chats and chat rooms like they were normal IRC channels.
LemonLDAP::NG is a modular Web SSO based on Apache::Session modules. It simplifies the building of a protected area with a few changes in the application. It manages both authentication and authorization and provides headers for accounting, so you can have full AAA protection for your Web space. LemonLDAP::NG is a complete rewrite of LemonLDAP. All components needed to use it and to administer it are included in the tarball. However, all modules developed for LemonLDAP may not work with LemonLDAP::NG.
Lifesaver is a GNOME Screensaver that displays recent posts about Ubuntu on Twitter, Identi.ca, and FriendFeed. Since it performs automated searches of various unfiltered Internet resources, you may encounter language and opinions that are offensive to those of a sensitive disposition, or inappropriate in a workplace environment.
Histwi is a Linux desktop program for Twitter account management. It allows you to download and save all your Tweets to a database, view and export all saved Tweets to HTML or text files, compare your Following to Followers, follow/unfollow any your friends, track new followers and unfollowers, and manage multiple Twitter accounts.
Qataki is a shell script that you can use to read/post notices from the command line in a simple manner. It supports Identi.ca, Twitter, and StatusNet. You can post, reply, retweet, or send direct messages; read personal, public, and user and group timelines (last statuses); read messages directed to you (i.e. where you are mentioned); read messages in context (conversations available only for Identi.ca/StatusNet); and search for notices.
Xpostulate is a blog/microblogging client that posts to Livejournal, InsaneJournal, IziBlog.net, DeadJournal, Scribbld, Inksome, Wordpress, and DreamWidth. It can tweet to twitter.com and dent to identi.ca so that you can announce new articles. This is all done via one interface, saving your login information for each, and thus simplifying cross-posting to your various social networking sites.