The problems surrounding software requirements are as old as software itself: Requirements are never specific enough, they take too long, and developers and testers often misinterpret them. Agile requirements practices require discipline, but when you do them right, they enable development teams to meet user needs faster. This report profiles four breakout vendors that have built Agile functionalities for requirements management that help application development and delivery (AD&D) teams communicate easily while keeping the customer at the center of their design process.