Emby is a great media server platform and with clients for multiple operating systems. The Windows Phone version has recently updated new features, new Emby branding replacing the Media Browser branding and there is now a free trial option.
The changes in this release include improved resuming so you can continue playing media from where you left off on another device. There is support for HTTPS when connecting to your server, the app now has an in progress view so you can see recently watched items, native sign in and bug fixes.
You can read more about it the app on the Emby blog.