Documentool is developed by Popay. Popay is a dedicated Oracle HCM consulting company.
We found on every single project that up to date documentation was a problem. So we bite the bullet, and created a document generator ourselves.
And by using it ourselves (eat your own dog food) on our projects in Europe and Africa, we implemented on a regular basis new features.
Since Popay does only Oracle HCM, we have no plans to develop Documentool for PO, Finance, CRM, ... or whatever other module that needs documentation.