To facilitate evaluation of workflow algorithms and systems on a range of workflow sizes, we have developed a workflow generator. This generator uses the information gathered from actual executions of scientific workflows on the Grid as well as our understanding of the processes behind these workflows to generate synthetic workflows resembling those used by real world scientific applications.
Additional details about this work can be found in our publication at WORKS08
Available Workflow Types
LIGO Inspiral Analysis
A large collection of DAXes similar to the ones listed above is available here. Note that is is about 290MB.