otocinclus - yes good little catfish - algae eaters. Stay small and peaceful - but not yet! Get that tank good and cycled before adding anybody.
http://www.otocinclus.com/newoto.html
Corydoras, commonly called cory cats, are also small peaceful critters. They are much chubbier in the body than otos. They don't eat algae, do eat fishfood that falls to the bottom. They have cute little rolling eyes, and bustle around the tank bottom, and occasionally dash up to the top for a gulp of air. Many patterns in the brownish, striped, spotted or plain species.
http://petfish.net/cory.htm