Earlier editions (i.e. 4th Edition) had Free Actions that included talking, etc. I can't find any mention of Free Actions in the 5th Edition Players Handbook (I don't own a Dungeon Masters Guide). However, in a 5th Edition compatible OGL manual from TPK Games "Fifth Edition Feats"; several of the feats mention using Free Actions.
Is there an "Official" mechanic/rule for Free Actions in D&D 5th Edition?