With Nucleus, you can set up one or more weblogs. If you want to, you can even show the contents of multiple weblogs on the same page. Each blog has its own team of authors. Some authors will only have posting rights, others will be allowed to change settings for the blog as well. Within a weblog, you can set up one or more categories. Each item you add in your weblog will be put in one of these categories. Nucleus provides a built-in Commenting System, so there's no need for external commentingtools. A karma-voting system is also provided.

The way your Nucleus site looks is fully tweakable through skins and templates, and multiple CSS files. Next to that, the language used by the Nucleus admin area can easily be changed through language-files. Additional features can be programmed in so called plugins and installed on Nucleus. This allows you to have the features you want, without having the Nucleus core to become bloated. The Nucleus plugin interface offers plugin authors lots of flexibility. Archives for your weblogs are automatically managed by Nucleus, and a search function is provided to look up old items. Nucleus also features highlighting search terms, both in articles, and in comments!

Syndication feeds are provided (as skins). Nucleus provides RSS and Atom feeds. Extra feed types (your favorite RSS flavor) can be added easily. Want to include an image in an item? Open the media popup, choose a file to upload and off you go! No need to open an FTP program and upload the file manually. Some nasty people screwing up your comments? Ban their IP address or IP range or nickname from further comments/votes. With a simple click you can create a backup version of the database contents.