Romain Gaucher, a specialist in web security, offers his Scalp tool in version 0.4. The log analyzer searches for attacks on Apache web applications.

Citrix has released version 5 of its virtualization solution, XenServer, claiming to have made more than 100 improvements to the product.

British company Simplexo now offers an open source search engine by the same name, targeted for enterprises. It promises cross-enterprise data searches in a mouse click.

Nagiosgraph, an extension of the Nagios monitoring software, is available as version 1.0.0. The program merges the performance data from the Nagios plug-in and presents them graphically on a webpage.

The battle in the virtualization market enters a new phase: Sun Microsystems released new versions of its virtualization software Sun xVM. And a few days ago Red Hat announced its takeover of Qumranet, makers of the virtualizer KVM. Meanwhile Microsoft and Novell are teaming up to counter with their own Microsoft Hyper-V and Suse Linux Enterprise Server offerings.

U.S. Linux distributor Red Hat has bought the virtual computing solutions vendor Qumranet.