The best alternatives to Ping Instant Messenger are BROSIX, Echo, and Threads. If these 3 options don't work for you, we've listed a few more alternatives below.
Echo is built by a fully-remote team for teams working remotely and is designed to compliment existing communication tools. You no longer need to choose between typing everything you have to say and “jumping on a quick call” — Echo fits right between the two.
WireMin is a decentralized social network that is dedicated to full freedom. It aims to build the next frontier of social network enabling completely free speech across the customizable communities.