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Back in January 2000, Wouter Demuynck was studying for a master in computer science. He was looking for a blog platform and, in his words (from Wikipedia): “I tried GreyMatter, but it didn’t allow multiple weblogs. PHP-Nuke and alike tools did not offer enough flexibility with the layout, and were not exactly what I was looking for. Movable Type, pMachine, Pivot etc. did not exist yet, so I had to come up with something of my own.

So in the beginning of 2001, I wrote (starting from scratch) the basis of what would later turn out to become Nucleus: a set of PHP classes, reading data from XML files. In the summer of 2001 I decided to move from XML files to MySQL and started building a good admin interface, so I could release the script and share it with other people.”

Nucleus is written in PHP and based on MySQL. It is released under the GNU GPL (General Public License).