1)   StatAssist 2.0
StatAssist displays graphs and related properties of more than 40 probability distributions. It calculates statistical moments, quantiles, and tail probabilities depending on the distribution parameters specified by the user.
distribution, probability, mean, variance, standard deviation, skewness, kurtosis, mode, quantile, discrete,

 2)   UltimaCalc Professional 3.0.647
Manipulate algebra. Integrals found & explained. Define own functions and constants. Find Standard Deviation etc. Plot functions. Solve Triangles. Least Squares fits, inc. nonlinear, Simultaneous Linear/Nonlinear Equations. Polynomial Roots. More.
algebra, algebraic graphing calculator, standard deviation, solve triangles, simultaneous linear equations, linear regression, polynomial regression, polynomial roots, multivariate regression, nonlinear,

 3)   Assessor for Teachers 6.1
Assess your students with style and save time. Assessor for teachers simplifies the processes of preparing assessment plans, marking assessment tasks, recording marks, analysing results and preparing reports
assess, mark, report, comment, mean, standard deviation, learning, analyse, learn, grade,