Horde Groupware Webmail Edition is a professional, collaborative messaging solution. It is fully modulable groupware (collaborative software).
It allows users to read, exchange and organise their emails, and to organise and share their calendars, contacts and tasks. More than a mere aggregate of technical bricks, Horde is an ergonomic bundle of applications like INgo, Turba, IMP and Mnemo, whose ergonomics make it a key, reliable collaborative messaging tool.
Horde is distributed under the GPL.
It is written in PHP
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