Seeing as today is the day that Pownce shuts down, I thought I’d list some of the other microblogging services that are still available.

Cartoonist Robert Crumb predicted Twitter in the 1960’s. (source: Christopher Herot)

1. Twitter – the original and still the most popular, it’s simplicity is key to it’s usefulness.
2. Jaiku – pretty much follows the same formula as twitter with the addition of attaching an icon to a post.
3. Plurk – An attempt to do things slightly differently, Plurk uses a timeline view for your own an friends posts and color codes different types of posts.
4. Identi.ca – based on laconica, an open source platform which supports the Open Microblogging protocol.
5. FriendFeed – part microblog, part aggregator
6. SecondBrain – More of an aggregator like FriendFeed, SecondBrain includes options for categorising your posts into collections.
7. Strands – Another aggregation based service, Strands also offers ways to automatically track the music that you listen to. There seems to be more on the way from this service too.
8. Seesmic – Video microblogging service, Seesmic is not starting to be integrated into blog commenting systems so that people can leave video comments.
9. Utterli – Utterli offers easy addition of video or audio to posts.
10. Present.ly – a private microblogging platform which allows posting to a group which can only be seen by selected members.
11. Yammer – another private microblogging platform, Yammer won this year’s TechCrunch50 prize.
12. Kwippy – features threaded discussions.
13. Rejaw – attempting to provide some powerful features without sacrificing simplicity.
14. Boobik – NSFW! Strictly for adults, this service is for people to share pictures, videos and talk dirty to one another.
15. Ping FM – Although not strictly a microblogging platform in itself, Ping FM allows you to post to multiple services at once including many of the ones mentioned in this list.

If you still want more then check out this big list of Twitter clones.