Cool EPG is a plugin, providing a specific EPG-look. Using ViX as image, this one is not needed, as ViX has a simular (but much faster) EPG.
Satman is part of XMLTV-import: a plugin, but default present in ViX.
Skins can controll the look of many items, including EPG-presentation.

The bottom line is: ViX provides a near-complete image, so not many plugins are needed.
But you will have to find out for yourself if you want to add any plugin.
My advise: Meteoviewer + Shoutcast.