I'm looking for tools that replace the use of Spreadsheets and PowerPoint. Ideally, it should touch on Business Strategy, Customers, Product, Market and Growth Experiments.
I'm using Craft for my technology startup, and it's a great, lightweight PrdM tool that goes all the way from conceptualising ideas all the way down to visibility into individual sprints. Provides a good supporting framework with nice traceability. Integrates with JIRA, too, and is really affordable - you can manage 1 product for FREE!