Softros LAN messenger - LAN messenger for an internal office chat for home or business users. It does not require a server and is very easy to install and use. It supports personal chats, group chats, message brodcasting, files transfer and remote desktop access.
Bulma - Bulma is an open source CSS framework based on Flexbox and built with Sass. It's 100% responsive, fully modular, and available for free.
MyChat - Secure instant messenger for any network
Milligram - A minimalist CSS framework
BORGChat - BORGChat is a LAN messaging software program.
Material UI - A CSS Framework and a Set of React Components that Implement Google's Material Design