Today i discovered a very useful tool for every web developer.Userfly is the most amazing usability analytics tool I've seen!. Who wants to know more about what users do in their websites.Who wants to get a very detailed understanding of how users are interacting with their blog. Userfly will give you the ability to:

• 1- Watch videos of real users on your website.
• 2- You can see every mouse movement and click your visitors make.
• This tool is very easy to use , just register and add  a single JavaScript code into your page header and enjoy .
• I can say about Userfly it’s a must-use service for web developers.