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MathStudio
SMath Studio
PTC Mathcad
Wolfram Mathematica
MATLAB
Mathcad
Miramath
Swift Calcs
Emu48
Wabbitemu
CEmu TI 84+ CE Emulator
meta-calculator
Virtual TI
TilEm
x49gp
web2.0calc
MathStudio Emu48SMath Studio - Tiny, powerful, free mathematical program with WYSIWYG editor and complete units of measurements support.
Wabbitemu - Wabbitemu is an accurate emulator for Texas Instruments based calculators TI-73 to TI-86.
PTC Mathcad - PTC Mathcad PTC Mathcad is Engineering Math Software That Allows You to Perform, Analyze, and Share Your Most Vital Calculations.
CEmu TI 84+ CE Emulator - Emulates the TI 84+ CE and TI 83 Premium CE calculators from a ROM dump from a real calculator.
Wolfram Mathematica - Mathematica has characterized the cutting edge in specialized processing—and gave the chief calculation environment to a large number of pioneers, instructors, understudies, and others around the globe.
meta-calculator - The most sophisticated and comprehensive graphing calculator online. Includes all the functions and options you might need. Easy to use and 100% Free!