Plotly is a collaborative, web-based graphing and analytics platform.
The Plotly web interface allows users to import and analyze data with a Python shell (NumPy supported) and datagrid. A Python environment and GUI allow users to create and style interactive, web-based graphs (see e.g.). Python scripts can be saved, shared, and collaboratively edited in Plotly.
The Plotly Python graphing library is a scientific graphing library. Graphs can be made with Python and a GUI, and shared with a URL for others to view, collaborate, or save a copy. The package is available here and on GitHub. Plotly can be installed from the terminal in two ways:
$ pip install plotly
or
$ easy_install plotly
Plotly also integrates with IPython to create interactive graphs in a Notebook. A few examples: