WordPress is a state-of-the-art publishing platform with a focus on aesthetics, web standards, and usability. WordPress is both free and priceless at the same time.

More simply, WordPress is what you use when you want to work with your blogging software, not fight it.

Wordpress 2.5:

The improvements in 2.5 are numerous, and almost entirely a result of your feedback: multi-file uploading, one-click plugin upgrades, built-in galleries, customizable dashboard, media library, and an all-new design that's easier to use than ever before.

Wordpress 2.5.1 zip file(Size  1.2MB)

wordpress 2.5.1 tar.gz (Size 1.0MB)