Finesse.io – fork, edit and experiment with websites

Co-founder here. We've been building (and using) this tool as a way for backend developers, front-end developers and designers to work together on front-end code in a more collaborative, but asynchronous manner. We hope it's an empowering tool that allows people to perform front-end coding and debugging without having to to install, configure and run the back-end locally.

Essentially it's an opinionated front-end cloud IDE, with built-in developer tools and GUI for git operations. But it also lets you build quick experiments matching any live or in-progress site with any new front-end technology. Happy to answer anyone's questions.