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
Fleiss Kappa for Inter-Rater Reliability | James D. McCaffrey
How to Calculate Fleiss' Kappa in Excel? - GeeksforGeeks
Inter-Annotator Agreement (IAA). Pair-wise Cohen kappa and group Fleiss'… | by Louis de Bruijn | Towards Data Science