XMind is a great software for concept maps. You can create them from scratch or using the useful templates and themes that comes along with the program.
XMind provides you many features for concept map customization helping you to express concepts for big projects presentation, for task organization or any other application you need to get things not only done but also WELL done.
XMind supports files such as images, text files or hyperlinks. It is actually really simple to use with a tabbed interface for you to open different maps at the same time. A sidebar will display the details regarding the element selected. All the maps that you create with Xmind are compatible with FreeMind and MindManager and be exported as a text, image file or in HTML format.