This is the FrontlineSMS super project. It is used to manage the separate modules of FrontlineSMS.
This project will set up a workspace for FrontlineSMS in e.g. Eclipse quite nearly:
git clone git://github.com/frontlinesms/frontlinesms-super-project.git frontlinesms-workspace
To then check out the source for the project's modules, run the following:
cd frontlinesms-workspace
git submodule init
git submodule update