JMAP Webmail built for the 21st Century. A modern, self-hosted email client for Stalwart Mail Server powered by the JMAP protocol. Email, calendar, contacts and files. Fast, private, and open source.
Kurrier is a modern, self-hosted workspace for email, calendar, contacts and storage.
Disposable webmail server (similar to Mailinator) with built in SMTP, POP3, RESTful servers; no DB required.