What makes CmapTools stand out from the rest is its ability to create online concept maps that include attached files and links to other sites. This allows for interactive diagrams made by this tool that allows you to interact with content through your browser. Also, sharing your concept maps and its resources online is a very useful feature. There are tons of available public servers that will store your maps and all of the attached files associated with it.
Making a concept map is simple, just insert diagrams by double-clicking on your screen background and drag arrows and lines wherever you want. Users can then modify text-box shapes, colors, fonts, link shapes, or add a background image and attach resources to each shape. Don't think twice, if you're in need of good concept maps download CmapTools, it's free.