1. Rich Chart Live - An excellent site for created animated flash based charts that can be embedded into a site. Also, a user has the ability to add links to a chart.
2. iCharts - A wonderful site/network for creating charts that you can embed into a site. Also, a user can share charts on social networking sites and browse/save other iCharts from the web.
3. Chartle - A great site for creating online interactive charts. What makes Chartle so unique and impressive is the ability to create more than your standard graphs such as: venn diagrams, maps, gauges, and more.
4. Hohli - A very user-friendly site, similar to Chartle.  Users can create a variety of charts, such as pie, scatter plots, and radar, then embed them into a site.
5. Lucid Chart - A nice site for creating a variety of different charts and diagrams. Also, it is a very easy site to use with a drag-n-drop interface. Best of all, Lucid Chart has an educational portal which allows chart creation free for education.
6. ChartGo - ChartGo is a neat site for creating charts that's very easy to use. All a user has to do is fill out the pre-determined sets of data and select the type of chart they want to create.
7. Pretty Graph - A simple site to use to make a wide variety of graphs, such as: line charts, histograms , and more. Also, a user can embed into a site, share with others users via email, or save as template.
8. Diagramly - A cool site for creating diagrams, flow charts, and more that is similar to Lucid Chart. Users of Inspiration should feel right at home w/ this online tool as there are plenty of shapes and clip art to choose from.
9. Cacoo - A great site for creating online charts and diagrams. A great feature is the ability to collaborate with others in real-time while creating a chart via a chat.
10. Lovely Charts - A easy site to use to make very polished charts. While not free, there are three paid versions to choose from, such as: iPad, online, or desktop.
11. Create A Graph - Simple way for students to create graphs.