Many Quantum Computer Simulators Exist for which all to date deal with qubits only.In otherr words |1>'s or |0>'s or a superposition of |1> and |0>.
Key features of the quantum qudit simulator are:
The ability to simulate not only qubit gates but dimensions higher than this ( qutrits etc )
The ability to view and save the transfer matrix of any circuit that is built.
The ability to design two circuits and check for circuit equivalence.
Easy to use graphics interface with drag and drop capabilities.
Full source code available for download aswell as working exe with full documentation.