In a true David-vs-Goliath story, the open-source guys at OpenNMS just beat out IBM/Tivoli and Novell to win the "Best Network Management Tool" award at this year's LinuxWorld.
[OpenNMS CEO Tarus] Balog describes the product, which can monitor up to 20,000 devices simultaneously, as “the first enterprise-grade network management product to be developed using the open-source model. It was designed from day one to be able to monitor tens of thousands of devices from a single instance of the application, and it aims to offer a better alternative to expensive commercial products such as Hewlett-Packard's OpenView, Micromuse Netcool, and IBM's Tivoli. The software is freely available and is supported by an international community of users and developers.Full disclosure: Tarus Balog, the head honcho at OpenNMS, is an old friend I've known since high school.
One of my favorite things about Tarus is his unique sense of humor. He witnessed a miracle in his kitchen last night, and now he's selling it on eBay.