PHP Content Management System (phpCMS) makes it possible to need only one template for your whole Web site.

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Developer: Bernhard Grün
License: GNU General Public License (GPL)
Operating System: Linux, Unix, Windows

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

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

he One or Zero Open Source Helpdesk and Task Management System is an extremely powerful, yet lightweight, package that is coded in PHP and makes use of MySQL and Sqlite.

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Developer: team
License: GNU General Public License (GPL)
Operating System: Windows, Linux

Manage your network with a free Network Monitoring Software application.

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Developer: Network Monitoring Software
License: GNU General Public License (GPL)
Operating System: Windows, Linux, Unix

Etomite is a fully featured Content Management System, built in PHP and using a MySQL database to store your site's data.

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Developer: Etomite
License: GNU General Public License (GPL)
Operating System: *nix, Win32

Pligg is unique compared to most other content management systems because of it's flexibility.

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Developer: Pligg CMS
License: GNU General Public License (GPL)
Operating System: All 32-bit MS Windows (95/98/NT/2000/XP), All BSD Platforms (FreeBSD/NetBSD/OpenBSD/Apple Mac OS X), All POSIX (Linux/BSD/UNIX-like OSes)

Free file manager.

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Developer: Tobias Bender
License: GNU General Public License (GPL)
Operating System: ALL