Identifying and Caring for Houseplants?

I'm a student worker at a library, and I recently inherited the care of a bunch of plants when that student moved on. My only problem is, I don't know anything about plants. I'm learning a lot, and with the help of books I think I've identified most of the plants and their problems, but there's a few I can't find. Help identifying and any tips on care would be very much appreciated, as these are the two I'm most worried about, especially the one in the red pot.