Canned Emails - A minimal site with prewritten emails
Callblock - The first app to block telemarketers automatically in iOS
analyze.email - Test the spam-y-ness of your emails
Truecaller - Find a person by a name or phone number worldwide for free using Truecaller.
TapText - Send canned text messages with a single tap
Hiya - Know who's calling or texting and block spammers on Android