CheckWMI

During the implementation process of our Nagios monitoring system, we had the restriction not to install 3rd party agents on our Windows systems that we wanted to integrate into the new monitoring environment.
Check_WMI ist a great way to realize agentless Windows monitoring on Nagios by using Windows-integrated protocols and communication interfaces.

To come along with our infrastructure and to provide compatibility with all versions of Microsoft Windows operating system, we did some improvements on this script, providing the new feature "checkdfs" for checking replication status of the Microsoft Distributed Filesystem, and granting access to Windows 2000 Server and Windows Server 2008R2 for the "checkmem" and "checkcpu" functions. At least, we did some restructuring on the code for better human readability.

The improved version can be downloaded from here:
http://www.martin-chauchet.de/download/nagios/check_wmi.zip

This plugin is a great start to client-less checking of Windows systems.

I submitted many enhancements to Matthieu along the lines of NSClient++. Refer to the changes and access the enhanced version at http://doc.smartmon.com.au/docs/tiki-index.php?page=WMI+Plugin

It's really helpful for me to monitor windows' Memory,CPU and Disk Usages. Only need an username and a password.

The Check WMI plugin is absolutely fantastic. It does away with the need to install and set up additional agent on windows machines and allows you to monitor the basics of a Winodws machine with minimum setup in Nagios. The directions are clear albeit that for different Linux distro things work a little different from that described. Excellent work!