TechWorm.net for a list of very useful websites.
10Minutemail.com - lets you create an email address that will self destruct after 10 minutes. Beat spam with this disposable e-mail service.
Date to Date Calculator - calculates the duration, which is the day count and the number of days, months and years between two dates. Among other things, it can be used to find how many days old you are and the weekday you were born.
Web Capture lets you take full HD screenshot of any webpage and convert that screenshot into JJPEG, PNG and PDF formats.
Use Google without country restriction - When you enter google.com , Google redirect you to country domain like google.in or google.co.uk. If you want to use Google without any country restrictions, open google.com/ncr. Useufl when you want to get more than the US centric perspective
Virustotal - is a free online virus scanner. that analyzes suspicious files and URLs and facilitates the quick detection of viruses, worms, trojans, and all kinds of malware.