There's an effort by one team of developers. You can find it at
http://gnukhata.gnulinux.in. I haven't tried it for sometime now. It
wasn't stable when I last checked. But, they have released a stable
version since.
There's also http://avsap.sourceforge.net/
wrong url:
svn co https://svn.nrcfosshelpline.in/branches/avsap/