Ramper - Ramper is a free web3 SDK for DApps to onboard users quickly.
33Mail - Simple free disposable email address service, unlimited free disposable email addresses.
Directual - Low-code for building sophisticated apps
SimpleLogin - Receive and send emails anonymously. Create a unique email address for each website to avoid cross-site tracking and protect your inbox from spam, phishing and data breaches.
Blockchain Demo - Visual demonstration of blockchain technology
TempMail - Temp Mail is the provider of fake and temporary email ID.