Doorstop!

You will need version 4 or higher of `firefox` https://www.mozilla.org/firefox
to run Pencil as a Firefox Extension. Linux users will need version 4 or higher of either `firefox`, `iceweasel` or `xulrunner` https://developer.mozilla.org/en-US/docs/Mozilla/Projects/XULRunner,
or version 25 or higher of `palemoon` https://www.palemoon.org/.
The Windows installer and OS X archive has everything you need built-in. Windows, Linux, OS X & Firefox Packages are available for download from the Releases Page https://github.com/prikhi/pencil/releases.
You can also install the Firefox Add-on from the Mozilla Add-on Repository https://addons.mozilla.org/en-US/firefox/addon/pencil-prototyping/.
To install the OS X package, unzip the archive and copy the `Pencil.app` folder t

Doorstop alternatives

  • rmtoo

  • rmtoo is a free and open source requirements management tool.

    tags: requirements-management software-development
  • PTC Integrity

  • PTC provides technology solutions that transform how products are created and serviced, helping companies achieve product and service advantage. The PTC Integrity product family provides a comprehensive set of Application Lifecycle Management (ALM) and Systems Engineering capabilities that enable cross-discipline collaboration, improve time-to-market, streamline compliance, and reduce product risk. Simplify the complexity involved in developing today’s complex engineered and smart, connected products. »

    tags: requirements-management software-management alm
  • IBM Rational DOORS

  • IBM® Rational® DOORS® software is a leading requirements management application that can help you reduce costs, increase efficiency and improve quality by enabling you to optimize requirements communication, collaboration and verification — throughout your organization and across your supply chain.

    tags: requirements-management