The development of the framework and the applications is a association process, with contributions both from alone developers and corporations. The Core Team associates are the humans who are actively complex on the development in designing and coding the framework and applications.

The applications are beneath assorted Open Source licenses, mostly beneath the GNU Public License. The Horde Framework itself, as of adaptation 2.0, is appear beneath the LGPL.

The Horde applications are accounting in PHP, a scripting accent absolutely advised to be anchored in web pages. PHP can be anchored anon into the web server, with plugins for not just Apache but aswell IIS, Sun Web Server, etc.

PHP is currently at adaptation 5, with abounding improvements including a new article model, bigger XML and web casework support. Horde modules should run on any belvedere that can run PHP (including as a cgi), bold any appropriate abutment modules (IMAP, for instance) are present.