Interesting links

List of resources on internet which I find interesting are listed here. 
Disclaimers : Please be careful that you don't violate any copyright or any other law while visiting these links. If some of these pages are violating any rules, I am not supporting them and I am not responsible for any violation done by creators of these pages or URLs. You visit these pages at your own risk and responsibility.
Useful tools and services: (no webcam)