OBM is a groupware, email, LDAP, Windows PDC, CRM, and project management application. It is mainly used as a mail server, as an LDAP directory, as a Windows PDC, as a contact and customer database, as a project management tool, or as any combination of these functions. It supports internationalization and themes.
oMail-admin is a PHP-based Web frontend to qmail and vmailmgrd. It can be used by domain owners and single users to easily administer their mail accounts without bothering the sysadmin. Its features include mailbox/alias management, auto-responder (vacation-like) support, support for changing passwords, and translations for the French, English, Swedish, Chinese, Japanese, Spanish, Italian, Russian, Danish, Romana, Czech, Nederlands, and German languages.
oMail-webmail is a Webmail solution for mail servers based on qmail and optionally vmailmgr or vpopmail. The mail is read directly from maildirs on the hard disk, which is much quicker than using protocols like POP3 or IMAP. Other features includes multiple language support (English, French, German, Japanese, Chinese, and many more), HTML and pictures inline display, folders, and address book support.
p3c is a pop3 checker allowing you to inspect your mailbox before downloading and to delete any unwanted messages. For you to choose wich messages to delete, p3c will show you the "To:", "From:" and "Subject:" portions of the mail and then ask you if you want to delete it or not. p3c works from the console using a simple text interface.