As is mentioned on the Zend Developer Zone, the Zend Server software has finally come out of beta and has made its first release (with a community edition too).

From the recent press release:

Zend Server CE is a completely free version of Zend Server that runs on Linux, Microsoft Windows, and Mac OS X, specifically tuned to address the needs of non-critical server deployments and for developer desktops/laptops everywhere. Zend Server CE comes with the same high-performance opcode caching and easy-to-use PHP administration capabilities as the commercial Zend Server.

You can find out more about the products and find the links for downloads of both the Zend Server Commercial and Zend Server Community Edition from the main Zend Server page on the Zend website.