Smaller Crypt sp. like Lucens, Willisii, and Wendtii
Smaller Anubias sp. like Nana and Nana "Petite"
Java Fern (most any species)
Java Moss
Anacharis
These are basic low light low maintenance plants. With a bit more light and some minimal ferts, you would be able to add a few more plants to your list. With lots of light, ferts, and CO2 you would be able to grow most anything and would only be limited by the size of your tank.