Roundcube webmail...is a browser-based multilingual IMAP client with an application-like user interface. It provides full functionality you expect from an e-mail client, including MIME support, address book, folder manipulation, message searching and spell checking. More information...
Mailvelope is an easy-to-use web-browser extension which brings OpenPGP encryption to webmail services such as Gmail™, Yahoo™ and others. With its unintrusive interface fully integrated into your webmail service, Mailvelope instantly secures your personal and professional email communications.
Email Apps Gallery
WiseStamp Email Apps enable users to bring functionality in every email they send. Check out our Apps gallery where you'll find 14 social, fun and serious apps. This list will continue to grow, so keep checking back.