Craft is a CMS from Pixel & Tonic. The folks at Pixel & Tonic cut their teeth doing commercial add-on development for the ExpressionEngine CMS. After almost a year after releasing Craft 1, they are now out with Craft 2. Craft is built atop the Yii framework. It approaches content management with the attitude that you define the containers for your content, not the software. Along with a powerful template language (powered by Twig), you can create reusable template code for your site.