TourBus is an application that does web testing on real-world servers. It combines the flexibility and expressiveness of a functional web test suite, the statefulness and intelligence of a regression test suite, and the concurrency of a load/stress/bench suite. In short, it can test your web application from end to end, and it can do it 100 times at once concurrently. Imagine if someone harnessed the power of a DDoS botnet for good.