WAMP5 is a Windows installer for Apache 1.3.29 and PHP5 (beta 4). It's principal aim is to allow you to easily discover the new version oh PHP : PHP5.
Two versions of WAMP5 are available :
WAMP5 light and WAMP5 full
The first one comes with Apache 1.3.29, PHP5 BETA4 and SQLITEmanager.
The second one is the same but with an extra MySQL 4.0.18 database and PHPMYADMIN.
You will find these two versions and all info at :
http://www.en.wampserver.com (english version)