Finamp has been my goto for my music collection for several years. I know there are better solutions, but I’m not hardcore, I just want a simple app that streams my music from the server reliably.
The only thing that is a pain is getting all the tags and metadata correct, but there are lots of good apps to help with that also.
Not only are his comics CC, his entire artistic workflow is built on FOSS. His art tablet runs Linux, he uses Krita for digital painting, his fonts and brushes are FOSS too, and he provides them free of charge for anybody to download.
He also provides free tutorials and guides on his setup and workflow, and advice one how to start using FOSS as a professional artist.