Online, free, graphing and spreadsheet tool
You can use Plotly for scientific-quality graphing

- Line graphs, bar charts, heatmaps, histograms, box plots and more
- Import data from files, Dropbox, and Google Drive.
- Analyze data with fits, functions, stats, and more.
- Collaborate by sharing projects with your team. 
- Share graphs online, in presentations, or to social media sites.

1. Upload your Data

Plotly understands Excel, Google Docs, MS Access, MATLAB, and text files.

2. Style your Graph

Publication-quality layout and color options.

3. Number Crunch

Dive into your data with an online Python console, APIs, or spreadsheet.
4. Share it
Share graphs with links or private folders.