TDMS Test Scheduler is a novel and user-friendly toolkit for engineers, researchers and instructors that are activated in the field of manufacturing test. It is the first toolkit that supports test scheduling based on Time Division Multiplexing (TDM) for multi-core, multi-Vdd Systems-on-Chip (SoCs), as far as the author knows. It is able to provide with solutions that minimize test cost, while power and thermal constraints are met. It offers a) a high-level language to facilitate the representation of a test process, b) two efficient solvers exploiting TDM, c) a rich visualization environment, d) a testbed for educational and research activities. It is free to use.