Nucleus
Nucleus is a tool to maintain one or more weblogs.

WordPress
WordPress is a state-of-the-art semantic personal publishing platform with a focus on aesthetics, web standards, and usability.

b2evolution
b2evolution is a classy news/weblog tool (aka logware), i-e software allowing you to run newsfeeds and weblogs.

bMachine
BoastMachine is a one of its kind Blog/Journal/Article publishing system.

pMachine
pMachine is publishing software which you can use to create everything from a simple weblog to a multi-layered interactive news site.

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