Hash Refinery has added UIS to the yescrypt and skein algos in addition to lyra2v2 where it has been active for some time:

http://pool.hashrefinery.com/site/gomining?algo=yescrypt
http://pool.hashrefinery.com/site/gomining?algo=skein

Please use your UIS wallet address as the username and "c=UIS" in the password field of your mining software to be paid in UIS, otherwise the pool can convert to BTC.

For more pool info see the main page: http://pool.hashrefinery.com/

Cheers!