jwma (java webmail app) uses jakarta mail (formerly javamail) to provide access to an imap email store. Multiple users can authenticate, read, send and manipulate email storage and persist a list of contacts, email identities and their own individual preferences.
It works with email stored in mbox or maildir format or stored in a derby database; it has been tested with dovecot.james and exim4. See http://jwma.sourceforge.net/ for further details.
AfterLogic WebMail Lite PHP is a free AJAX webmail application. Users can receive, view, manage, compose, and send email through web interface (IMAP and SMTP supported). Source code included.
This is an email client written in Java, using Swing and JavaMail. It supports IMAP (including
disconnected IMAP), POP3, and unix-style mbox folders. It also has (alpha) support for encryption using PGP and S/MIME.
Jnestor is a majordomo developed in java: it can reads an IMAP/POP3 folder (email folder), identifies the elements in it and process them, transforming them as Mantis issues.
The software is still experimental, but it passed succesfully the last stages of testing and I hope I will release a stable version soon.
Columba is an email client written in Java, featuring a user-friendly graphical interface with wizards and internalionalization support. Its a powerful mail management tool with features to enhance your productivity and communication.
JMailChecker is a Java/Swing-based desktop-application for monitoring email-accounts using pop3 or imap. Inspired by the "Magic Mail Monitor" but written in Java to be used under Linux or Mac OS as well.
Deliver is a file transfer protocol and implementation designed to be a safe, open-source alternative to the most extended transfer protocols like the traditional e-mail.
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OpenJean is a cross-platform, extensible, personal information manager. It includes: file manager, RSS aggregator, calendar and appointments diary, mailer, image manager, multimedia manager, favorites, notes, tasks, anniversaries, topics and address book
Engroup is the web enterprise groupware promotes various collaboration methods plus adding company business management modules. Features are included: CRM, HRM, Document Management, Project Management, Chat, Wiki, Forum, News, Todo.
Multiplatform Java 6 application which queries Zimbra server and notifies about incoming events (new mail, appointments etc.) in tray area. Something like (but more than) Zimbra Toaster.
Platemail is a cross-platform email client written in Java, featuring built-in, configurable spam detection and filtering capabilities, the potential for a variety of user interfaces and the option of storing mail in a relational database.
This project aims to develop an open source client for Novell GroupWise. It uses the Eclipse Rich Client Platform for its user interface. Thus enabling a native looking and feeling and feature rich client for all major platforms.
WebMail is a Java Servlet application that gives users WWW access to their IMAP/POP mailboxes. It supports folders, multiple languages, composing messages, MIME and virtual domains.
Transfers email from an exchange 2000/2003 account to local file, smtp address, or procmail. Written in Java, this uses OWA protocol and can be run periodically on a server with no user input. Useful for Exchange servers which don't enable forwarding.
Notifier for multiple Gmail and Google Apps email accounts. Offers various notification options (unread mails in Inbox only, All Mails, or with specified labels) and alert methods (popup message, chime, blink keyboard LED). Uses IMAP over SSL.
As an open source project for project management, Factory lets you organize actors in teams, define projects, create version-based plans, generate forecast calendars and track statuses. Small and stand alone, it runs on every system with Java.
Helper is an integrated PIM and social networking (blog, RSS, foaf, etc) client. Allows to store, annotate and navigate information uniformly by means of folders, tags and categories. Based on OWL, Eclipse RCP and open standards (Dublin Core, foaf, etc).
Spamato is a spam filter system that combines several anti-spam techniques, from which thousands of users benefit. It is available as an add-on for Thunderbird and Outlook, and as a stand-alone proxy for other email clients. IMAP and POP are supported.