This is a kind of file launcher like menu.
This is alpha version now and distributed under GPL.
The source nightly shot is here. It was built with KNOPPIX 6.4.
To install, please compile and copy the file src/plugins/numenu/.libs/numenu.so to the lxpanel/plugins directory (depend on your system like /usr/lib/lxpanel/plugins,
/usr/lib64/lxpanel/plugins, or so on)