There is a tradition to learn mishnayot at a mourner's house, where the mishnayot chosen start with the letters from the deceased person's name. (Lists of mishnayot corresponding to each letter can be found in the back of, e.g., the Artscroll bereaevment siddur.)
Is anyone aware of good (online) references containing short divrei Torah for mishnayot that are appropriate for a mourner's house?