It is running the most current OS, version 2.7, plus Roon Server 1.6 build 416, the Drive Mounter app which allows you to mount external USB and SAMBA (network) drives, and also Resilio Sync which is a P2P file sync and share solution which I never used. You can also download a variety of apps such as BubbleUPnP Server, Bliss, MinimServer, songkong, Squeezebox Server, Subsonic, etc.
Keep in mind that although Roon Server is installed, it does not come with a Roon license… you need to buy your own either annual or lifetime.
The one year parts and labor warranty is expired, but Andrew from Small Green Computer provides lifetime technical support for all his products. If you are already running Roon, all you need to do is restore from a backup. If this is your first time with Roon, just reinitialize the database and start from scratch.