Lightweight Open Source webmail written in PHP and JavaScript
Unofficial ProtonMail Desktop App
Sync Outlook with Google, SOGo or any other CalDAV / CardDAV server
C library for sending e-mail (with attachments) from C/C++
A serverless email server on AWS using S3 and SES
The cult-favourite eMail client formerly known as Qualcomm Eudora
Send Mime and Smime Emails to Any Type of Mail Server
Outlook Plugin for storing emails to Alfresco
Reduce misspelled email addresses in your web apps
A mailing list manager with an excellent web interface
Business webmail modular application with mobile client
eml2pdf converter
send mass mail
ImpraStorage provided a private imap access to store large files
Complete Club Management System
Simple Email sender application in the smartest way .
Email client based on the Eclipse RCP platform.
This is a php script that runs outside Drupal to send your Simplenews
Robust open source POP3 client and MIME parser written in C#
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MailChecker - The simplest way to check your multiple webmail accounts
A email newsletter system