After a bit of Googling, I believe they are Eastern Spadefoot toads.  If you compare the pattern on the back of one of the Three Amigos shown below to the image on this page, they seem to match up.   It's hard to get a good photo of the froglets that really shows this. Upon further reading, the Eastern Spadefoot toad tadpole stage lasts from 2-4 weeks which matches up with these fellas.  I've also read they tend to lay in temporary bodies of water after heavy rainfall which also lines up.  

Side note: I wish HaD would increase the image file size limit.