Nucleus_CMS
Nucleus CMS is an open-source blog management software package written in PHP,[1] with a MySQL backend. It is used to manage frequently-updated Web content. With a little tweaking (mainly to skins), it might be considered[2] a lightweight content management system.[3]
Nucleus makes use of a callback function which has led to a plugin system in multiple languages.[4][5] The general drive within the development community is that functionality should exist as plugins as totally as possible. This philosophy has led to a relatively light and uncluttered base install.