CoCalc by SageMath, Inc. is a real-time collaborative platform for using your favorite programming languages and applications (with flexible cloud compute resources). Easily compare results, share files, and run scripts with colleagues who have different workflows from your own (all in real-time). Think Linux terminal, Jupyter Notebooks, LaTeX/Markdown documents, VS code, Pluto, X11 Desktop, Course Management System, a Computational Whiteboard/Slideshow mode, and now, Compute Servers.