mika consists of the server component and different clients. For storing the source code we use Subversion. The repository can be checked out through SVN with the following instruction set:
svn co https://mika.svn.sourceforge.net/svnroot/mika mika
mika server is written in PHP and uses MySQL. All clients connect to the central mika server. Clients can be written in any Client-specific programming language. Currently you can find two different clients: smartphone/mobile web-based client using HTML5 (jQTouch) and J2ME (Symbian/Nokia) for Nokia legacy devices.
If you are interested in contributing to mika please contact Sebastian.
The Subversion is organized by the different sub-projects (server, client-jqtouch, client-j2me). In any sub-project you will find the specific trunk folder.