An open source pool server for Primecoin - x.pushthrough (XPT) protocol:

http://www.peercointalk.org/index.php?topic=2647.0
https://github.com/traffiq/candypool

It does not seem to have Riecoin miner support but can be added.

You can now setup your own private pool server and use your favorite XPT miner. YPOOL will need to figure out a better way of handling developer's fees. Some form of client-side data encryption maybe necessary.