I am now in the venture of finding and setting up a bitcoin pool company. However, after some research, I found out that there are plenty of bitcoin pool software. There are:

1. CoiniumServ
2. Cryptonote Universal Pool
3. MPOS
4. NOMP

5. Bitcoin Pool

   etc.

I am actually quite confused about the differences of all these mining pool software. Can any kind soul help to explain the differences?

Thanks in advance!