1. C/S structure
2. compute in memory
3. dynamic add and remove nodes on the graph db
4. with lots of algorithms of graph
5. opensource

Think about there's an app you apply it to app store, more and more people download it.
Social network is an important feature of your app;
Users of app follow each other through adding count.
There's the questions:
1. how to ognaize the network links of your app users ?
2. how to get the users follower and follwing ?
3. if user A follow B and B follow C, how to know the relationship between A and C.

Besides, timewall can be also used to other fields:

1. how to prove the `Six degrees of separation theory` with a better way ?
2. actually you can simulate a body, trate each node as cell on animals.
3. on astronomy, node also be the plant.