VLC media player 2.1.1 32-64 bit Multilingual

Free cross-platform media player without installation.
Download Portable VLC 32-64 bit Multilingual Online (0.6 MB)
In first screen enter: 2.1.1

Extract and run VLCPortable.
If you drag'n drop a file on (or open with) VLCPortable: it will be opened in VLC.
Settings of installed VLC should be preserved.

AIMP 3.55.1324 Multilingual

Powerful audio player without installation.
Download Portable AIMP 3 (6.6 MB)

Extract and run AIMP3Portable.
Settings of installed AIMP should be preserved.

Winamp 5.6.6.3512 Pro Full & Lite Multilingual

Media player without installation.
Download Portable Winamp Full (14.7 MB)
Download Portable Winamp Lite (8.3 MB)

Extract and run WinampPortable.
On Windows XP Winamp Full needs .NET Framework 3.5 and remain in process after exit: run KillWinamp.exe. Settings and playlists created in portable folder (Data\Winamp).
Settings of installed Winamp should be preserved.