dev-util
dev-util / diffoscope : Will try to get to the bottom of what makes files or directories different
media-libs
media-libs / libsdl : Simple Direct Media Layer 1.2 compatibility wrapper around SDL2
media-libs / xine-lib : Core libraries for Xine movie player
media-video
media-video / ffmpeg : Complete solution to record/convert/stream audio and video. Includes libavcodec
media-video / mplayer : Media Player for Linux
media-video / mpv : Media player for the command line
media-video / vlc : Media player and framework with support for most multimedia files and streaming
media-video / xine-ui : Xine movie player
sci-visualization
sci-visualization / gnuplot : Command-line driven interactive plotting program