Ramper - Ramper is a free web3 SDK for DApps to onboard users quickly.
TempMail - Temp Mail is the provider of fake and temporary email ID.
Directual - Low-code for building sophisticated apps
10 Minute Mail - Temporary disposable e-mail service to beat spam. Avoid spam with a free secure e-mail address.
Blockchain Demo - Visual demonstration of blockchain technology
Mailinator - Any Inbox. Any Time.