Doorstop

Requirements management using version control.

14 Alternatives To Doorstop

Basecamp

A simple and elegant project management system. Basecamp is more than just a project management tool — it’s a better way to work. Teams that switch to Basecamp are more productive and better organized.
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Cradle

3SL Cradle is a requirements management and systems engineering software tool.
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Innoslate

Innoslate is a complete product lifecycle management tool integrated with systems engineering, program management, and product design capabilities.

Jama

Jama combines requirement management software with enterprise collaboration capabilities to solve product delivery problems.
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Jama Connect

Collaborate with your team and share the data you care about in one place
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PTC Integrity

PTC Integrity Software Suite provides a comprehensive set of Application Lifecycle Management (ALM) and Model-Based Systems Engineering capabilities that enable a holistic software and systems engineering approach by improving collaboration, automat…

Polarion

A single, unified solution for requirements, coding, testing, and release.
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Redmine

Redmine is a flexible project management web application. Written using the Ruby on Rails framework, it is cross-platform and cross-database. Redmine is open source and released under the terms of the GNU General Public License v2 (GPL).
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ReqView

Simple and powerful requirements management tool enabling easy requirements gathering, traceability tracking and offline collaboration.

Requirements Quality Suite

The Systems Engineering Suite offers you the tools, processes and skills to Verification, Traceability, Reusability and Quality.
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Traceable Requirement Management

Product Managers and Requirement Engineers need to efficiently capture and communicate the “voice of the customer”, to enable their organization to deliver the right offers at the right time.
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Trello

Infinitely flexible. Incredibly easy to use. Great mobile apps. It’s free. Trello keeps track of everything, from the big picture to the minute details.
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VR

A Visual Editor for Requirements

rmtoo

rmtoo is a free and open source requirements management tool.