Repeated Measures  ****
This applet simulates a two-condition experiment. You can specify the number of subjects per sample (n), and the population means for each condition (Mean A and Mean B). You can also specify the correlation between the two groups in the opulation (rho), and the  population standard deviation (sd, which is the same in each condition). You also determine whether to use a within-subjects or a between-subjects design.

Robustness of t test and ANOVA  ****
Lets you explore the effect of violations of the assumptions of normality and homogeneity of variance on the type I error rate and power of t tests (and two-group analysis of variance).