Bolt is powered by Expose Framework and loads by the in-build LESS functionality very fast. Themexpert provide it in 6 different pre-definded styles, which makes it usable for nature-, sport-, travel-, car-, cityscape- and event websites. Two bonus pages for 404 error and offline mode are included. You can create also a Joomla one page website with it. The Scrollspy support make this possible. Bolt is native to Joomla 2.5 and Joomla 3.x. The download is commercial.