What are your favorite modern inventions or conveniences?

There are some recent inventions, technology, and conveniences I cannot imagine being without. Items I am very grateful for, and literally changed my life once I discovered them. Of course there are obvious ones like the internet, cell phones, fax machines; but, what about the ones that are not so obvious that we tend to take for granted. Items and services I would sorely miss if it was no longer available.

Here are mine:

Pay at the pump gas
DVR
Tampons
Honeycrisp apples