All these can be done within Visual Paradigm, the design environment and on the web, anytime, anywhere. With our UeXceler tool, you can write user stories and manage them with use cases, sprint and tags. User story is a proven technique to capture and maintain user needs. Visual Paradigm is a number of useful tools wrapped into one product with three levels of access to fit your needs (see pricing options here).
Doc Composer lets you produce detailed design specification ready to use in discussion with just a few clicks. Modeling tools like Resource Catalog, Transitor, and Nicknamer make system modeling easy and cost-effective. Visual Paradigm features all the UML diagrams and ERD tools essentially in system and database design.