Join Date: Jan 2008
Fissidens because of their dark green colour and also their shape.
UG because of the soft weeping grass look they have.
Anubias barteri var. 'Petite' is also very nice, again because of the dark green colour and because their shape contrasts that of the above two plants.
For something a little lighter green in colour, Hemianthus callitrichoides is always a nice go to.