Community » Applications » Horde
What is Horde?
The Horde Project is a group of developers who write web applications using the Horde Application Framework, itself a product of the project.
The Horde Application Framework is a flexible, modular, general-purpose web application framework written in PHP. It provides an extensive array of components that are targeted at the common problems and tasks involved in developing modern web applications: libraries for dealing with preferences, compression, browser detection, connection tracking, MIME, and more.
The Horde Framework, by itself, does not provide any significant end user functionality; it provides a base for other applications and tools for developers. You will probably want to install some of the available Horde applications, such as IMP (a webmail client), or Kronolith (a calendar). There is a list of Horde applications and projects at http://www.horde.org/apps.
This software is OSI Certified Open Source Software. OSI Certified is a certification mark of the Open Source Initiative.
Further information on Horde and the latest version can be obtained at
Information on applications that use the Horde framework can be found at
The following documentation is available in the Horde distribution:
|COPYING:||Copyright and license information|
|docs/CHANGES:||Changes by release|
|Coding standards for Horde projects|
|How to contribute to Horde|
|docs/INSTALL:||Installation instructions and notes|
|docs/RELEASE:||Release process notes|
|docs/UPGRADING:||Pointers on upgrading from previous Horde versions|
Instructions for installing Horde can be found in the file INSTALL in the docs/ directory of the Horde distribution.
If you encounter problems with Horde, help is available!
The Horde Frequently Asked Questions List (FAQ), available on the Web at
Horde LLC runs a number of mailing lists, for individual applications and for issues relating to the project as a whole. Information, archives, and subscription information can be found at
Lastly, Horde developers, contributors and users also make occasional appearances on IRC, on the channel #horde on the Freenode Network (irc.freenode.net).