Daisy is a comprehensive content management application framework, consisting of a standalone repository server accessible through HTTP/XML (using the ReST style of WebServices) and/or a high-level (remote) Java API, and an extensive browsing and editing DaisyWiki application running inside Apache Cocoon.

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Developer: outerthought.org
License: Apache License
Operating System: OS Independent (Written in an interpreted language)

Hippo CMS is an open source information centered content management system.

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Developer: Tjeerd Brenninkmeijer
License: Apache Software License
Operating System: Unix, Windows

NINO is a network management solution to manage routers, switches, servers and applications.

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Developer: NINO
License: Artistic License, GNU General Public License (GPL)
Operating System: OS Independent

Combines content management, e-commerce, and site management.

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Developer: Carol Skelly
License: Free for non-commercial use
Operating System: Windows

Pheap offers a simple, bold interface that masks a powerful content management system.

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Developer: Spencer Akers
License: Freeware
Operating System: ALL

Micro CMS is the only program available that combines a search-engine-friendly WYSIWYG with a simple, AJAX-based content management system, making the management of your static web site incredibly easy and fast.

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Developer: Implied By Design LLC.
License: Freeware
Operating System: Linux / Windows

Free Simple CMS is content management software (CMS) that is available as a free download under the GNU General Public License.

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Developer: Dustin Cowell
License: GNU General Public License (GPL)
Operating System: All