I recently just got clippings from a few people in my office, and they nor I know what they are. here are some pics plant 1 2 pics of plant 2 plant 3
The first one looks like Syngonium. Agree on Philo for the 2nd. The Begonia is a cane type, for looking for culture info. I've had luck propagating roots in both soil and water (as is also the case for the Syngonium and Philo.)