Micro-blogging is a form of multimedia blogging that allows users to send brief text updates or micromedia such as photos or audio clips and publish them, either to be viewed by anyone or by a restricted group which can be chosen by the user. These messages can be submitted by a variety of means, including text messaging, instant messaging, email, digital audio or the web.

While Twitter is getting the lion’s share of all the social media and micro-blogging sites from the press and the blogosphere, there are other alternatives. Few more like Twitter:

MySay -
It is what it says. Instead of text updates, users call MySay and say how they are doing today. Then, friends or family can listen via phone, e-mail, or the web.

Jaiku -
It is considered by many to be Twitter's closest competitor. Most features and functions are similar. It will be interesting to see how the company plans to emerge from the shadow of its main rival.

12 Seconds -
This is a micro-blogging video website. We’ve all been sent links to 8 minute YouTube videos where there is really only a small bit of content that’s entertaining.

Frazr-
Frazr is also very similar to Twitter. The main difference is one of language. Frazr is focused primarily on the French and German markets.

Hictu-
Hictu is a service for video microbloggers. A webcam and a mouse-click are all that is needed to create a videopost. This streamlined solution saves time and effort for traditional vloggers.

Rememble -
It is a 'washing line' for your digital bits and pieces. Thread together texts, photos, videos, sounds, scribbles, scans, notes, tweets... so they're not drifting in a digital wasteland.

FriendFeed -
If Posterous makes micro-blogging quick, easy and useful, FriendFeed is at the complete other end of the spectrum, filling your data stream with lots of noise, data, and in this author’s opinion being completely unusable.

and many more...