I'm not saying anything new when I commented that GitHub has become an endless source where to look interesting projects, regardless of our interests.
Browsing the forums I have seen two that I found interesting to comment to you, and maybe do not know it. Do we see them?...
omxd: The omxd daemon plays your playlist even if you've disconnected from your Raspberry Pi, to allow the easy implementation of various media centre apps. That is, everything that passes to /var/run/omxctl, plays it.
Ludovision is a web-based remote control for a media server. Simply put, use your phone or tablet and the Raspberry Pi to play videos. It runs on Node.js and uses omxplayer to display videos.