AtMail is a webmail client. The project aims to provide an elegant client for existing IMAP mailservers, with less bloat and a focus on an intuitive, simple user interface. Features include complete Webmail functionality, address-book support, video mail, an AJAX interface, drag'n'drop, and more.
GROUP-E is collaboration software which integrates groupware, project management, and business server on one platform. The solution is based on a LAMP architecture (Linux, Apache, MySQL, PHP). GROUP-E offers project management, transparent Samba (file server) integration, integration of Cyrus IMAP server with administration and personal SIEVE filters, support for SyncML 1.0, LDAP-based user management with single sign-on authentication, and LDAP contact databases. GROUP-E also provides ActiveSync for synchronization.
Hastymail is a full featured IMAP/SMTP client written in PHP. The goal is a full featured yet lightweight Web mail client. After a complete review and rewrite, it provides many improvements over the original code including optional AJAX functionality, improved code organization, a plugin API, CSS and PHP template themes, and much more.
IMAPEngine is an IMAP server that uses a tdbengine database structure to store all accounts, messages, and mailboxes. This means it has nearly no limits in numbers, sizes, and performance, and it uses indexes to sort/find its data. IMAPEngine is IMAP4Rev1 compatible and also has built-in support for the ACL, ID, IDLE, and UIDPLUS extensions. It is not (yet) an MTA, but it retrieves incoming messages from different POP3 servers. An simple integrated Web interface makes account configuration easy.
Kolab is a groupware system that provides a comprehensive and flexible solution for workgroups. Email, contacts, and group calendars can be managed via the Web, Windows/Outlook, and Linux/KDE. It supports offline synchronization and full seamless support of mixed client environments because the Kolab-XML storage format is fully open and avoids MAPI/TNEF.
Openmailadmin is a little administration interface to every complete IMAP mail server daemon. It supports every feature IMAP provides, and fits in most MTA configurations. A key feature is the non-standard, generic administration hierarchy which not only seperates "normal users" from "administrators", but enables the mailserver-master to create instances between them. You will be able to let other users create their own sub-users and thus either share a single mail server between different organizations or project your company's employee structure. It excels with features such as regex addresses and folder ACL management.
Pico is a fast, full featured mobile application for any Java (J2ME) or Symbian cellphone. Including full HTML Web browsing, feature-rich email, multimedia-enabled SMS, and an RSS feed reader, Pico combines all the rich functionality of PicoWeb, PicoMail, PicoSMS, and PicoRSS into a single application.
mujMail is a powerful and graphically atractive email client for mobile devices. Its operations are multithreaded, so you can send mail, retrieve mail from multiple mailboxes, and change settings simultaneously. It uses RMS to store mail messages persistently on the device, so don't have to connect to a server to read old mail. It has the unique ability to redownload a damaged message or body part and repair it.