Designed with embedded devices in mind. Connman has its own shiny home page at connman.net
There are two repositories, one for the connman core:
git://git.kernel.org/pub/scm/network/connman/connman.git
another for the connman GNOME user interface:
git://git.kernel.org/pub/scm/network/connman/connman-gnome.git
Check out HACKING file and then the README