Hamster Pad - A social network built on top of Slack
TempMail - Temp Mail is the provider of fake and temporary email ID.
Doof - Share your hopes and dreams.
10 Minute Mail - Temporary disposable e-mail service to beat spam. Avoid spam with a free secure e-mail address.
sup3rS3cretMes5age - A safe, simple tool for one-time (self-destructing) messages
Mailinator - Any Inbox. Any Time.