Well, on arcade.xml it lists:
<plugins-used>
<plugin id="Audio" version="1">Audio</plugin>
<plugin id="Keyboard" version="1">Keyboard</plugin>
<plugin id="Mouse" version="1">Mouse</plugin>
<plugin id="Sprite" version="1">Sprite</plugin>
<plugin id="Text" version="1">Text</plugin>
<plugin id="TiledBg" version="1">Tiled Background</plugin>
</plugins-used>