Looking for RoR photo publishing application for my website


I have a website that runs mephisto and I want to add a photo publishing platform that runs on RoR. I tried out gullery and rgallery. I'm not sure if any of them is still under active development. I want an app that:

[1] is (and probably will be) under development [2] is easy to use and supports basic features of photo publishing (albums, categories) [3] easy configurable CSS page in order to make it look like my website [4] community supported (if possible)

From google I was not able to find an application more popular than rgallery (apparently is the most popular web photo publishing platform on RoR) but as I don't know if it's still developed or abbandoned. Do you have something to propose?