GraphPad Prism: comprehensive, scientific and statistical software to analyze life-science experiments. It includes many tools for curve fitting and all typical statistical analysis procedures (ANOVA, t-tests, nonparametric functions, and many more).
Technical graphics at the highest level - instantly presentable! SigmaPlot offers excellent statistical tools for more than 50 statistical analysis and more than 100 2D and 3D graph types. Take advantage of the statistical consulting assistant.