I use c9.io, and also a self-hosted version (https://github.com/c9/core https://github.com/c9/core) occasionally. Using even the free c9 service, connecting to

I use c9.io, and also a self-hosted version (https://github.com/c9/core https://github.com/c9/core) occasionally. Using even the free c9 service, connecting to your own server via SSH, you can create a fantastic collaborative development environment. Although I do most of my development locally, cloud IDEs are perfect for the remote pair-programming use-case - they're far better than screen-sharing.