ComboCounter

Each successful critical hit raises a streak counter, and the streak resets after 2 seconds pass without another critical hit. A separate combo counter follows consecutive successful combo hits in the same way, also resetting after 2 seconds. Attacks that cause knockback feed the chain, and hits on living entities count whether the target is a mob or a player.

The overlay is customizable and is meant for tracking combat performance in duels, raids and training sessions. Because the mod runs only on the client, a server does not need to install it, and players can use it in single-player or on any server. ComboCounter is published for Fabric only, across five release versions: 1.21.4, 1.21.8, 1.21.9, 1.21.10 and 1.21.11, with 1.1.0 for 1.21.11 as the latest file. Mod Menu is optional and adds a configuration screen for the overlay.

The source code is publicly available, but the license is All rights reserved, so the code is not open source and the mod may not be redistributed or modified without permission.