I know most of you already know these apps or need something more advanced but I found them interesting so I thought I might as well share it here for those not familiar with them.
WARNING: one of the apps in the list (Plexamp) doesn’t appear to be open-source so use it with caution.
Direct URLs, for those who prefer it
boxy is awesome, one of those little programs that has a lot more going on than you first expect (as a very casual desktop user)