I'm working on my tech interview platform: https://onlineinterview.io/
It is a free platform that allows people to develop on the browser using multiple programming languages, draw on a shared board and talk over video.
This is a bit more than half-baked. I created this project because I wanted a platform for code interviews with video chat that was free and didn't require creating an account. So I decided to build it and share it for free. I still have things to do (mostly internal tools and back-end stuff) and I will keep developing it based on user feedback.