mcbroken
Is the McDonald's ice cream machine broken?
竞品与替代品
Have I Been Zuckered
Is your phone number present within the Facebook data breach
Pmarca Blog Archive
The Pmarca Blog Archive Is Back… as an Ebook
Google Mobile Friendly Test
Is your web page mobile-friendly?
Illegal Analytics Scanner
See if your analytics are breaking the law
Linkchimp
Check for broken links in Mailchimp emails