By low maintainance I am assuming you mean "hardy" and not sensitive or "expert" fish or animals. Damselfish are colorful and very hardy.Usually reccomended as beginner or first fish Try the link below for some of the best saltwater advise on the web.

Here is a link that might be useful: reef central

probably a bit late but you cant beat lions for hardiness and visual appeal.

Clowns and Damsels, Centropyge Angels, a few Blennys, some Chaetadon Butterflys,.....