I'm playing with http://herbstluftwm.org/ http://herbstluftwm.org/ - it's written in C++, has an IPC command line client written in C. The configuration file is

I'm playing with http://herbstluftwm.org/ http://herbstluftwm.org/ - it's written in C++, has an IPC command line client written in C. The configuration file is a bash script that uses the IPC client, but you can also use a script/program in your favorite language instead.