I recently installed a rocket.chat server which I covered here Rocket Chat, yes it’s better than Teams.There are a fair few Rocket Chat blogs published over the last few weeks. Sothis post is going to show you how to install it and some cool things you can
Its open-source but not free (for commercial use). Node-Red is a completly free replacement.
Yeah, n8n is not open source. It’s source available. ActivePieces has an MIT license.