The 7^th annual Petascale Tools Workshop (formerly the CSCADS Workshop on Petascale Tools) will be held July 15^th-17^th this year in Madison, Wisconsin. Technical sessions will take place in the Computer Sciences building at 1210 W. Dayton St. in Room 1240. As in previous years, we will begin with presentations of people's work, and will then break up into working groups to tackle real technical problems for the last day of the workshop.