Alliance are a serie of different mods. On the Star Wars GC, you can play the civil war Empire vs Rebel era + Black Sun and soon the Republic and CIS.
The new Nebulon C made by Warb_Null based on art by AdamKop ( Adamkop.deviantart.com ) with two new skins from Nawrocki, one for Black Sun and other for the Rebels. I have published more screenshots from other units at my own site.