LAN messaging apps

What p2p apps do we know of that work on computers and/or cell phones that can do chat (asynchronous?), calls, and/or file sharing on the LAN? Peer auto-discovery is optional? By p2p I mean that I install the app on two phones and now they can communicate, without installing an always-on server anywhere. We could also list server-dependent apps if that server can be installed on a router running LibreMesh. This is starting as a list based on our needs, inspired by and simpler than the charts at https://secushare.org/comparison. This page grew from this thread. Maybe someone can make a chart based on this info.

RetroShare

• platform:
• LAN peer auto-discovery:
• functions:
• stability/usability:
• website:
• other notes:

Ring

• platform:
• LAN peer auto-discovery:
• functions:
• stability/usability:
• website: https://ring.cx/

Briar

• platform: Android
• LAN peer auto-discovery: no, initial connection face-to-face
• functions: text chat
• stability/usability:
• website: https://briarproject.org/

Scuttlebutt / Patchwork / Patchbay

• platform: Linux/Windows/Mac yes, Android in alpha
• LAN peer auto-discovery:
• functions:
• stability/usability:
• website: www.scuttlebutt.nz

Bitmessage

• platform:
• LAN peer auto-discovery:
• functions:
• stability/usability:
• website:

ZeroNet

• platform:
• LAN peer auto-discovery:
• functions:
• stability/usability:
• website:

KouChat

• platform: Linux, Android
• LAN peer auto-discovery: yes
• functions: synchronous text messaging, file sending
• stability/usability: some messages get dropped, otherwise very simple and easy
• website:

WiFi Walkie Talkie

• platform:
• LAN peer auto-discovery:
• functions:
• stability/usability:
• website:

Tox

• platform: Android, iOS, Linux, Windows, Mac, FreeBSD
• LAN peer auto-discovery: maybe? LAN discovery thread
• functions: chat, file transfers, audio/video calling, desktop sharing (both as video and inline screenshots), text group chats with audio groups
• stability/usability: no real offline messaging yet, how does it affect phone battery life?
• website: https://tox.chat/
• notes:

Twisted

• platform: LibreMesh/OpenWRT
• LAN peer auto-discovery:
• functions:
• stability/usability: I don't know if this is actually a useful thing. It's on the list of search results for "chat" in the LibreMesh package database.
• website: