Wikipedia discusses Plotly this way: “Plotly, also known by its URL, Plot.ly, is an online analytics and data visualization tool, headquartered in Montreal, Quebec. Plotly provides online graphing, analytics, and statistics tools for individuals and collaboration, as well as scientific graphing libraries for Python, R, MATLAB, Perl, Julia, Arduino, and REST. Plotly was named one of the Top 20 Hottest Innovative Companies in Canada by the Canadian Innovation Exchange. Plotly was featured in “startup row” at PyCon 2013.”

Are you working in Python? Have a look at the Plotly Cheatsheet.