SpicyNodes for a while and eventually I have done it.
The site offers a tool for making interactive presentations, mind maps, visualizations or organizational charts. The process of creating a map is simple and straightforward. The result is attractive and cool.
Having my students in mind, I made a very simple visual map of English tenses in the active voice. What they usually forget is the formula of each tense. Now I have put the basic rules into this map. Click on the bubbles to see what is inside.