MATLAB - A high-level language and interactive environment for numerical computation, visualization, and programming
GraphPad Prism - Overview. GraphPad Prism, available for both Windows and Mac computers, combines scientific graphing, comprehensive curve fitting (nonlinear regression), understandable statistics, and data organization.
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.
OriginLab - OriginLab is a data analysis tool that provide the engineers and scientist with the technical charts and system for 2D and 3D plotting and all kind of fitting including curve and peak fitting.
GNU Octave - GNU Octave is a programming language for scientific computing.
SciDaVis - SciDAVis is a free application for Scientific Data Analysis and Visualization.