Rigale is a gameplay modification to Warband. It adds many new features, like guilds, exploration system, quests, quite extensive crafting, epidemics, village specialties, many new skills (scouting, camping, shamanism, bard, mining, ambushing...), gathering system, shamanism, exhaustion system, and many other things
Available guilds in towns are randomized at the beginning of the game. You will not find twice the same guilds in towns in Calradia in different games :-)