Super Slick Static Site Builder: Mixture

A rapid prototyping and static site generation tool for designers and developers

Tons of features; really cool stuff going on there. Check out the HTML variables and the Liquid templating engine from Shopify. Also take a peak at the Models data storage approach for some really cool stuff. Additionally there's a bunch of great frameworks ready to bootstrap your project (and yes, Bootstrap is one of them ;) I gave it a comparison to Hammer and think Mixture is better.

Check It Out