Hamster Pad - A social network built on top of Slack
Mailinator - Any Inbox. Any Time.
Doof - Share your hopes and dreams.
TempMail.altmails - Disposable temporary email addresses
sup3rS3cretMes5age - A safe, simple tool for one-time (self-destructing) messages
Harakirimail - Harakirimail is a free disposable email service. Just send email to anythingyouwant@harakirimail.