This is a trivial modification of TeXchat built by Juan Batiz-Benet.
You first need to install node; use this version.
Then do
git clone https://github.com/alcarola/TeXchat/ texchat
cd texchat
npm install
Start the chat server using
node backend/server.js
and go to http://localhost:8080/ in your favorite web browser.
TeXchat is under the MIT License. All dependency libraries are each under their own license.
Feel free to contact me.
##Wish list##
Use local mathjax installation.
Translate into Swedish
Write chatlog to disk.