It's a super basic modpack for me and my family to play. Backbone mods include Iron's Spells and Spellbooks, Create, Zoog's family of mods, the Aether, Oh the Biomes We'll Go, Alex's Mobs, and Farmer's Delight.
It's pretty electic and not really built or any one thing in particular, rather it gives every Minecraft player *something* to bite into.