Bolt is a Joomla 1.5 and 2.5 template. The Bolt template is designed to be easy and fast. Named in honor of Usain Bolt, the world's fastest man, it loads in a fraction of the time of many other templates.
Breeze is a Joomla 1.5 and 2.5 template. Breeze got its name because it's so speedy and lightweight that installing it is a "breeze".