Insight Server is a Linux-based email server utilizing open source components to provide a highly reliable, scalable, and cost effective email solution for customers of all sizes. It's designed to facilitate complete messaging and collaboration capabilities within a company. It supports all standard protocols, and provides backup and recovery tools, server redundancy, migration tools, and resource management.
The Gordano Messaging Suite (GMS) is a highly flexible and reliable suite of messaging products. Customers can choose which components meet their needs from email, Webmail, collaboration, instant messaging, calendaring, SMS, and list server software all of which can be complimented by high level anti-spam, anti-virus, and archiving options.
The QmailToaster is an RPM-based Qmail distribution for CentOS, Fedora, SuSE, and Mandriva. This system is designed for ease of deployment and includes strong anti-spam systems. This includes support for SRS, SPF, DomainKeys, and virtual hosting on the SMTP side. On the user side, this has a Web-based administration interface and supports POP3, POP3 over SSL, IMAP, and IMAP over SSL.
Wallal is a standalone LDAP-to-Web gateway. It allows you to search, add to, modify, and delete from an LDAP database. It can format entries and validate them upon submission, and the entries displayed are fully configurable. It was designed with a "personal" LDAP server in mind (one that is used primarily as a phonebook). However, it should be reasonably easy to modify it to do more complex operations on a directory.
NTX is a groupware solution based on Open-Xchange and CentOS5, and is distributated as an ISO image. Open-Xchange can be a challange to install for most people, but this ISO image makes it very easy. In less than 45 minutes, it installs the OS (CentOS5), Open-Xchange, and all its requirements and third party software like avaadm, linbox, Amavis, ClamAV, websieve Spamassassin, munin, and monit.
Libral is an address book engine. It allows you to create your address books and to add personal and company cards to them. Data managed in a personal card include personal data (name, surname, address, etc.), Web links, email addresses, irc uris, telephone numbers, job information (company where the contact works, manager, collaborator, etc.), and notes. In a company card you can manage Web links, email addresses, telephone numbers, and notes. XML is used to store data. Libral can import addressbooks from GnomeCard, Kaddressbook, VCard, Evolution, and CSV.