This is a desktop wrapper for Nirvana HQ - a great GTD tool. It creates a window that contains a WebKit that loads Nirvana.
Note I have no affiliation with People Like Us, the makers of Nirvana!
Currently ou have to checkout the project and build it on your own. Execute ./configure && make && make install
See more instructions in file INSTALL.
If you got some errors building after changeing some code, just try following commands in a row:
aclocal
autoconf
autoheader
automake --add-missing