HEY - Email at its best, new from Basecamp.
Roundcube - Web-based IMAP email client
InstAddr - Disposable email address application.
Mailpile - Mailpile is a modern, fast web-mail client with user-friendly encryption and privacy features.
Rainloop - RainLoop is a web based email client.
Soverin - Soverin is the honest email service that doesn’t sell your data.