DIPITY

Dipity is a free aplication that allows the creation of interactives timelines. Organize the information  chronologically.

Dipity allows do timeline easily and quickly.

You can choose the organization of your timeline: in hours, in weeks or years.

I think that Dipity is useful when you are studying for history because you can made a timeline. 

This is the timeline about the history of personal computer:

History of the Personal Computer on Dipity.