HitPing

This is a purly audio mod that plays a ping sound when you land high-reach hits in PVP. A soft ping sounds on hits between 2.8–2.9 blocks, and a sharper ping sounds on hits at 2.9+ blocks everything is configurable to your liking including the distance of hit which the sound will play, the volume and type of the sounds — helping you recognize your best hits and improve your pvp.