Cpline Ping is a stream-oriented social network service based on the Free Software StatusNet tool.
If you register for an account, you can post small (0 chars or less) text notices about yourself, where you are, what you're doing, what you're working on or what you're thinking about. You can also subscribe to the notices of your friends, or other people you're interested in, and follow them privately or on the Web.
You can also post event invitations, bookmarks, polls, questions, or other kinds of data.