Prospero.Live is a SaaS pair programming platform featuring a code editor, shared cloud filesystem, video calling, screen sharing, whiteboard, and code runners. It is designed for a super quick collaborative inner development loop where you talk through features, work on code, and see it run all with as few keystokes as possible. You can get started in minutes and there's no need to install anything. It is great for every part of writing code, but excels for prototyping, fixing bugs, interviews, and hanging out all day with another developer demoing snippets of code.