Keywatch is a free, open source monitoring system that provides the adaptability of a modern monitoring system without being complex or hard to configure.
Keywatch runs on most platforms. The server runs Java OSGi and the client technology is AJAX, requiring only a standard web browser.
By offering Keywatch under the Apache 2 license, we hope to build a community that will contribute functionality for Keywatch to support common monitoring challenges and a lot of specific ones, making Keywatch an attractive alternative to expensive and less flexible systems.

See the features site for more detailed featurelisting.
We are pleased to announce the availability of Keywatch 1.1. This release features optional JMS/ActiveMQ support for better scalability and robustness.
Keywatch 1.0 is released under an open source license.