The first one is a "milk frog"(Trachycephalus resinifictrix) the second is a "borneo eared frog" (Polypedates otilophus) and the third frog I think I have seen somewhere but don't remember off the top of my head what it is. I think it is one of the southeast asian tree frogs though.
(edited to add: try Polypedates dennysi, it is a likely candidate that is present in the pet trade and therefore easily acquired by an institution. It would help in identification though if your picture of the third frog was a full body shot).





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