Here's a list of some nice looking, but sturdy low light plants. They will still need fertilizer though, weekly liquid ferts would be fine. If you want, you can does liquid CO2, but its not necesarry.
Green Temple (Hygrophilia corymbosa)
Ozelot Sword (Echinodorus ozelot0
Java Fern (Microsorium pteropus) These are the hardiest, but need to be attached to wood or a rock...