It looks like Amazon Web Services may be launching a new workflow manager called SWF. First spotted by TechCrunch reader Michael Hood, SWF is listed as a service under AWS’ Free Usage Tier. Unfortunately, clicking on SWF takes you to a ’404′ page.
Upon further digging, it looks like SWF stands for ‘Amazon Simple Workflow Service.’ It basically starts, runs, and retains workflow executions, as well as schedules tasks, adds markers, receives signals, and starts timers for those workflow executions. According to the information listed, with the free usage tier, "1,000 Amazon SWF executions can be initiated for free. A total of 10,000 activity tasks, signals, timers and markers and 30,000 workflow-days can also be used for free."