I-Ting Angelina Lee, an MIT student, has developed a runtime system called Cilk-M which emlploys thread-local memory mapping to support cactus stacks in work-stealing runtime systems. The software is not yet publicly released, but is available to researchers on request. It will be available on the web soon.
Jim Sukha, an MIT student, has developed Nabbit, a software implementation of task-graph execution using work stealing. Available at http://people.csail.mit.edu/sukhaj/nabbit/.