... It’s a Mind Mapping Tool which works inside your browser letting you save your maps locally or saving it as a file. You can also save your maps as images so that you can share it with others easily. Here is a screenshot of MindMapr in action...
Overall, this is a complete Mind Mapping Application which you can run inside your browser and can even work on it when you’re offline. The first Screenshot shows the ToDos and Blog Posts Nodes, in a similar way, you can also create a mind map and start brainstorming on your next project or on your blog. MindMapr App’s Minimalism makes it look good and the interface is distraction free.
Via Baiba Svenca
This is an open source application, free to use, works offline on Google Chrome. Good choice for students when they can't access the internet.
Link to Google Chrome store https://chrome.google.com/webstore/detail/mindmapr/njkigggmlihigheckmmebgogbgdmllpo
Handy browser based mind mapping tool. Link for Chrome addon is: https://chrome.google.com/webstore/detail/mindmapr/njkigggmlihigheckmmebgogbgdmllpo