Mootools http://mootools.net
MIT licence

Slimbox (clone de lightbox en plus léger)
http://www.digitalia.be/software/slimbox

SwfObject http://code.google.com/p/swfobject
Licence GPL

JW player, http://www.jeroenwijering.com
Licence http://creativecommons.org/licenses/by-nc-sa/2.5/

Audio Player http://www.1pixelout.net/code/audio-player-wordpress-plugin
Licence http://creativecommons.org/licenses/by/2.0/

Mp3 player, Copyright (c) 2005, Fabricio Zuardi
http://musicplayer.sourceforge.net

Emff http://emff.sourceforge.net
Licence opensource

TjpZoom http://valid.tjp.hu/tjpzoom
http://creativecommons.org/licenses/by-nc-sa/3.0/

Some Scripts from http://www.dynamicdrive.com/

En option:

Tiny mce
http://sourceforge.net/projects/tinymce/
GNU Library or Lesser General Public License (LGPL)