Revou is a PHP driven social network software that allows you to run your micro blogging site just like Twitter & Jaiku.
Revou was founded on Dec, 2007 to develop social networking software similar to the micro blogging site, Twitter.com for local automobile industry to create a platform for their users to get regular updates on major events as well as personalized updates of user’s friends via SMS and instant messaging on the latest news and prices.
Then, Revou decided to form a software development company to offer web site owners the same benefit, that is to allow them to start a site just like twitter without spending large sums of money to custom built such an application and give them the ability to get start a “twitter clone” site immediately. [Techcrunch]