http://www.romaframework.org
Roma allows you to develop enterprise level Java applications with low effort following a real Domain Driven Design approach. It's a new way to conceive the application: anything is a POJO, from the GUI forms to the persistent objects. Using the Meta-Framework approach you can integrate the latest breaking technology in your application without modifying your domain and application logic because they are really decoupled. Roma is Open Source and licensed under the commercial friendly Apache 2.0. Take a Quick Tour to know what Roma can do for your development. Once tried you'll never go back to conventional J2EE tools!

Cacti is very powerful, easy to use-implement, web based monitoring tool using rrdtool and snmp.

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