Solution 1:

After much searching on the internet without any real help I found the answer myself.

In Ubuntu 14.10 the default media player Rhythmbox can be used as a music client to access DLNA server. The only problem is that not all necessary files are installed by default.

There are just few steps to take:

  1. Enable Grilo DLNA client in Rhythmbox. Go to Tools -> Plugins and make sure that "Grilo Media Browsing" (or similar) is enabled.
  2. Install Grilo plugins. Open "Ubuntu Software Center", search for "grilo-plugins" and install package "grilo-plugins-0.2".
  3. You are done now. Open Rhythmbox and should already see your DLNA server in the left column. You can browse it and play your music. If you do not see it, try clicking little "+" sign on the bottom left and then "Find new devices" (or similar). See picture below. Small toolbar at the bottom left side