RCloud is an environment for collaboratively creating and sharing data analysis scripts. RCloud lets you mix analysis code in R, HTML5, Markdown, Python, and others. Much like Jupyter notebooks, Beaker notebook, Apache Zeppelin, Sage, and Mathematica, RCloud provides a notebook interface that lets you easily record a session and annotate it with text, equations, and supporting images. lets you easily browse and search other users's notebooks. You can comment on notebooks, fork them, star them, and use them as function calls in your own notebooks.