Fleiss' kappa in SPSS Statistics | Laerd Statistics
Fleiss' Kappa | Real Statistics Using Excel
Significance table for Fleiss kappa. | Download Scientific Diagram
AgreeStat/360: computing weighted agreement coefficients (Conger's kappa, Fleiss' kappa, Gwet's AC1/AC2, Krippendorff's alpha, and more) for 3 raters or more