Java fern and anubias are good plants. I don't have personal experience with java fern, but I believe it can't be planted in the substrate, so you will have to tie it to a rock or driftwood or a decoration. I have some anubias nana and it's a nice plant. You can plant it in the substrate, but don't bury the rhizome (the part that the leaves come out of).
If you want floating plants, my favorite is green myrio (AKA "frill plant" at Petsmart). It sheds a lot if your temp is too high, though.
Back to non-floating plants, Amazon sword is also nice.
I really like red ludwigia, too, but it will outgrow your tank if you don't keep it trimmed.