Check out these samples of web based tools:
Demos

Fictive but realistic personas
Here you can try a demonstration of a tool from Clondyke Software to generate fictive personas. This can be useful for systems during development or testing.

High quality password generator
For most people it can be challenging to come up with novel and good password that can also be remembered. But with this tool from Clondyke Software you can get plenty of suggestions the next time you new a new password.

Where is the IP address located?
Anyone on the internet has an IP address. If you want to know where in the world a specific IP address is located this demo will show you how.

Decoding of handwritten numbers
Have a go at a classic example of image classification by Computer Vision.