With Tiger Envelopes you can stop snoops from reading your email. Same email client. No extra steps. One click to install on Windows and Linux. Configures Outlook, Thunderbird, and KMail. Supports GPG, PGP, Bouncy Castle encryption.1 weekly downloads
HIndi Mail Client in Java, can be extended as a editor and a plugin on web pages to mail and view mails in Unicode Devnagri Font. The Mail Client could be used to embed into a HTML page so that people need not install it to view and recieve mails.