What is JIRA from Atlassian.com ?

 JIRA is an interesting system (an Enterprise Form and Workflowsystem, must often called an Issue Tracker) - very stable and with a lot of expansion possibilities, and can be - with an onDemand instance be used for $10 a month.

Read JIRA as a holistic Form and Workflow system

An onDemand (cloud based) has some restrictions regarding plugins, as an alternative option, run the product on a "local" or cloud based server.

I can recommend the book here for JIRA Admins (and developers)

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