IT Monitoring Software: Zenoss
Zenoss Core [1] is an award-winning open source IT monitoring product written in Python/Zope that delivers the functionality to effectively manage the configuration, health and performance of networks, servers and applications through a single, integrated software package.
One of the ten most active projects on SourceForge.Net [2], Zenoss software has been downloaded [3] over 600,000 times. Zenoss Core is being used by over 4,000 companies around the world, from small to medium sized enterprises to large global 2,000 corporations.
2008/07/24: We are very pleased to announce that the latest stable release of Zenoss, version 2.2.3 is now available for download. The Zenoss team has been hard at work nailing down defects (80+ closed!) and 2.2.3 should be one of our finest releases yet. While this is primarily a maintenance release, a lot of work has gone into testing and improving upgrades and installations.
[1] http://www.zenoss.com/
[2] http://sourceforge.net/projects/zenoss
[3] http://www.zenoss.com/download/links?nt