This chapter introduces a software toolkit that has been developed as a technical foundation for evaluating the QM mechanisms described in the previous chapters. The toolkit allows for performing experiments on top of commercial cloud labor platforms, either based on live experiments or simulations. It specifically supports the CSP/DVM model introduced in Chap. 5 as well as the DVM for multi-labeling introduced in Chap. 6. The chapter is structured as follows: Sect. 7.1 describes the toolkit architecture. Afterwards, Sect. 7.2 explains how real-time experiments can be conducted with the tool whereas Sect. 7.3 addresses the concept of the simulation mode.