http://www.timeanddate.com/date/duration.html - Calculate duration between 2 dates.
http://www.onlineconversion.com/ - Convert just about anything to anything else.
http://maildrop.cc/ - MailDrop is a free throwaway e-mail address. It's temporary. It's transient. It's disposable. It's meant for those times when you don't want to give out your real address. Just give someone any e-mail address in the maildrop.cc domain, come back here, put in the e-mail address, and you can see that inbox. Free disposable email address..
https://www.usa.gov/ - The offifical portal of the U.S. Government
http://www.time.gov/ - The official U.S. Time (any time zone).
http://www.charitynavigator.org/ - A guide to intelligent giving, determine if a charity is valid or how they spend their donations
https://support.google.com/.- With Google Voice, you get a free phone number for calls, text messages, and voicemail. You can use the apps on smartphones and computers, and you can link your number to any mobile or landline number. And you can set it up to make calls on your own phone. Great service!
https://www.contacthelp.com - ContactHelp.com will find the fastest way to reach customer service and support for almost any item you purchase.