1/ Could be a Blyxa.......but not surely.
2/ is qite surely a Rotala - likely wallichii, but could be something similar.
3/ is allmost defenitely Dracaena. Likely sanderiana. Not an aquatic plant. Will grow happily, potted in your window.
- do a Google on the names, to find instructions for growing them. They're quite common, so there will be plenty of info......