The sky's the limit when it comes to building flashy dynamic charts and graphs. Here are five free tools that will deliver great results.

The Bangalore-based startup says its CanvasJS charting software is more compatible across various devices than competitors running on Flash or SVG, and runs over 10 times faster.

Zoho offers its own Gantt chart tool that operates based on a drag-and-drop interface, so you just need to drag and drop between task bars to define relationships and dependencies.