Power Custom Fields™ offers a suite of useful custom fields that we think should be part of every Jira installation. These will improve the user experience and will allow you to customize Jira to better suit your needs. See the difference between Power Custom Fields Premium™ and Power Custom Fields PRO™ here.
Available Custom Fields
- Interval Custom Field
- Regex Custom Field
The old documentation (for version 3.0) can be downloaded from here.