This clientside mod adds player heads next to chat messages, as seen on the screenshot above.
It makes telling various people in chat apart a bit easier, and it looks hella nice.
Based on a request from Hugman on the Fabric Discord.
Cloth Config (and Mod Menu for Fabric) is needed to access the settings, but the mod works without it, using the default settings.
Note: The default settings might not work on some servers. In this case try using the "Heuristic only" sender detection mode. Note that this might put wrong chat heads on some messages.
Note: Incompatible with newer versions of OptiFine (~1.20.1), use Sodium and co instead.