I am searching for a mp3 player for Linux that resembles 1by1 on features: light, free, with no playlists, just selection of files to play using a directory navigator. Any suggestion?
I use moc, it does have a playlist window, but you can hide it and just play from the directory listing. It's what I turned to after giving up on new Amarok.
I use quodlibet. A nice little player with comprehensive file-type support and fabulous metadata editing abilities. It has a "File System" view, which meets your criterion.
mpg321 are commandline MP3 players. You could associate them with MP3 files in Thunar/Nautilus/file-manager-of-choice. They take a list of files/URLs to play as arguments:
$ mpg123 /path/to/mp3s/*.mp3 # plays all mp3 files in directory /pat/to/mp3s (generally in order of filename) $ find /path/to/mp3s -name '*.mp3' -print0 | xargs -0 mpg123 # plays all mp3 files in /path/to/mp3s and subdirectories
man mpg123 or
man mpg321 for details.