PHP-Nuke is a CMS (Content Managment System) that integrates in its inside all the instruments that are used to create, in a broad sense, an information portal. Given the immense number of present functions in the installation and in an even greater quantity of modules developed from third parties, the system is also adept to the management of Intranet business, e-commerce systems, corporate portals, public agencies, news agencies, online companies, information sites, e-learning systems and so on...
PHP-Nuke isn't free anymore, you need to pay some fee to the developer. So here goes the retail one.