Slackin - Create your own public Slack chat community
Mailinator - Any Inbox. Any Time.
Hamster Pad - A social network built on top of Slack
TempMail.altmails - Disposable temporary email addresses
Mio - Powering seamless communication between workplace chat apps.
Harakirimail - Harakirimail is a free disposable email service. Just send email to anythingyouwant@harakirimail.