indian fern is good but grows CRAZY under high lighting
Hairgrass is a good carpet plant, aslong as you have medium lighting or a very shallow tank
Polysperma is the same as indian fern i find
Crypts are a great plant. they grow under high, moderate and low light conditions. I have 3 or 4 different types of crypt and i realy love them, i have red wenditii, balansae, plus another couple ones i think...
I LOVE tiger lotus, it grows best under high light but can be grown in moderate lighting quite well, it is an awesome looking plant....