Ninteger: a non-integer control toolbox for Matlab. This toolbox implements non-integer controllers both in the frequency and the discrete time domains. Over thirty formulas are available for approximating a non-integer order derivative on-line. Structures such as non-integer PIDs are directly available and second and third-generation CRONE controllers may be reckoned. There are functions for finding norms, identifying models and plotting frequency diagrams. A graphical interface allows choosing parameters interactively and checking what the performance will be. The toolbox also includes a Simulink library. Its code may be freely distributed and altered provided that the source of the code is acknowledged and this warning is kept in all further copies and/or alterations.