[OFFICIAL!] Plex VR for Daydream is now available

The official Plex VR client. Experience your media in dazzling and interactive virtual reality. You can easily watch together with friends using voice chat, custom avatars, and your choice of customizable environments. Learn more at plex.tv!

[Unofficial] Plevr for HTC Vive and Oculus Rift

The unofficial (and now unsupported) client for desktop. Still available on Steam.