Today, I'm open-sourcing my life's work and magnum opus: ShipReq.
ShipReq is a SaaS/webapp for storing and managing project requirements, tasks, and issues. It's like a highly configurable combination of JIRA, Excel, and Word, plus new and innovative features not found anywhere else.
It was born out of frustration working in an environment where Excel and Word were used for requirements, and everything fell out of date, and was hard to keep correct. ShipReq makes certain classes of errors impossible, and other types of errors trackable. For example, you can write Use Cases such that all the links between steps always stay correct as intended;