There is no reason to think that you need to rely on third-party templates to achieve good documentation. Use the steps indicated in this article by Adriana Beal, and you will be much closer to the goal of producing top quality documentation than any overspecialized template could help you achieve:

http://www.bridging-the-gap.com/stop-the-endless-quest-for-templates/

By Adriana Beal

I am constantly getting these questions from business analysts:

What role does a BA play in an agile project?

What kind of tasks/documents the BA is responsible for in an agile project?

Where does a BA fit in a Scrum project, where you only have three roles, product owner, ScrumMaster, and team?

Before I give my answer, I need to provide a disclaimer: Read more