MailHog, Mailtrap.io

https://github.com/mailhog/MailHog MAILTRAP.IO Mailtrap.io Email Sandbox Service Capture SMTP traffic from staging and dev environmentsAutomate test flows and scenarios with flexible APIAnalyze email content for spam score and validate HTML/CSS

TempMail

Your Temporary Email Address Forget about spam, advertising mailings, hacking and attacking robots. Keep your real mailbox clean and secure. Temp Mail provides temporary, secure, anonymous, free, disposable email address. https://temp-mail.org

Welder

Easiest way to record your remote podcast in high quality. Create a session, invite your guests & start recording for free. Download high-quality video & audio files for each participant. All in your browser. Use our video transcription now. Online and free. Just drag & drop your file. https://app.getwelder.com