Help me ID these plants!

I just came back from school and I found these plants with their pots next to a garbage bin with a "We Need Help :(" sign.  Can someone help me identify them so I can properly take care of them?

They were found in a -10°C snowing day, outside...  I hope the cold didn't kill them!

More pictures:

EDIT Left to right : zebra plant (aphelandra), baby's tears (soleirolia) and artillery fern ( pilea microphylla). 

Thanks to reddit user green-light!