Knock On Doors by Crimulus - Knock on Doors!

This simple Minecraft mod adds realistic knocking sounds to doors and trapdoors. When you have an empty hand and attack a door or trapdoor, you'll hear a characteristic knocking sound, similar to zombies trying to break through barriers.

The mod was created based on the original Door-Knocker development but has been significantly improved - knocking now only occurs when your main hand is empty. This makes door interactions more intuitive and realistic.