WabbitEmu TI Calculator Emulator software is a free and open-source emulator that allows users to simulate Texas Instruments calculators on their computer. The software supports a wide range of TI calculators, including the TI-73, TI-81, TI-82, TI-83, TI-83 Plus, TI-84 Plus, TI-85, and TI-86. It also features a debugger and allows users to load and save calculator ROM images.