Bookvar is not a black box, but quiet the opposite. It has an extensibility model build in which allows developers to build custom add-ins that integrate nicely with the application. More information on how to develop add-ins can be found in the development section of the site. Here is a list of custom add-ins that we have build for you to try Bookvar is an extremely easy and funny to use mind mapping tool.

Rapid and interactive creation of mind maps
Creating mind maps with Bookvar is as easy and funny as playing computer games. You can build your mind maps in a matter of seconds by using handy keyboard shortcuts. You can drag files from your computer and drop them in the mind map.