Media Player (3)

• The Free Software Media System | Jellyfin (jellyfin.org) tool
  GPL server for streaming your own video, music and books; no tracking, no paid tier, donation funded
  Media Server Self Hosting #
• mpv.io (mpv.io) tool
  Minimal player driven by Lua scripts, with GPU decoding, OpenGL/Vulkan output and embeddable C API
  Command Line #
• calibre - E-book management (calibre-ebook.com) tool
  E-book library organiser, format converter and reader; donation-funded, led by a single developer
  Document Management #