We will compare two web 2.0 tools : xtimeline and digity.
Xtimeline allows teachers to see who contributed what to the timeline. Teachers can add photos when necessary. It is specially useful for group project. Xtimeline author controls who is permitted to change content, helping to ensure inappropriate material doesn't find its way onto the end product.
The aim of Dipity timelines is to bring communities together. The idea of ity is to use all of the data available (in this case from your Facebook profile) to create an actual timeline which can then be used to create connections with your community. Here you can see things like who has attended (or will attend) the same events, the same schools, the same groups.
We use Harry Potter as an example, let's have a look of two different versions on xtimeline and dipity:
The outlook of dipity is better than xtimeline. Moreover, you can insert video into dipity. You can see the photo at the same time. You can use the zoom bar to view the select the time in dipity