Emacs by default can show images. With Exwm can be your window manager. With EMMS, your audio and video player. With doc-view and even more, with PDF-tools, you

Emacs by default can show images. With Exwm can be your window manager. With EMMS, your audio and video player. With doc-view and even more, with PDF-tools, your document viewer. With Org-Mode, your brain on stereoids. With ERC, your IRC client. With Telega, your Telegram client. With Malyon, your Z-Machine interpreter. With M-x Calc and Gnuplot, your CAS lite. With Maxima and Texlive, your medium CAS with inline equation output and plotting.