Project to build a Java mail/news reader. Based at mozilla.org. [Open Source, MPL]

A set of tightly integrated corporate communication tools for email, calendar management, name directory and web browsing. Supports Windows, JavaOS, and Solaris. [Commercial]

A client is presented with features, screen shots, Download, change logs, installation help and FAQs. [Freeware]

A JavaMail based email client. Supports IMAP (including disconnected mode). Requires Java 2. [Open Source, GPL]

Standalone java application that lets you check and fetch mails from a POP3 server. [Open Source]

Free, fully-featured email client written as a Java application: Supports POP3 and SMTP, and has an address book, features to view/send/save attachments, delayed posting, etc. [Open Source, GPL]

Mail and news client, with support for SMTP, IMAP, POP3, Unix Mailbox, and NNTP. [Open Source, GPL]

An email client written in Java and based on the Java Mail API. [Open Source, GPL]

JavaMail Client [Open Source, GPL]

Freeware Java SMTP command-line client.