Design Interfaces at Scale
Atomize Design System is the most advanced UI design framework that helps designers create beautiful and consistent user interfaces for the web.
Prepros is a tool to compile LESS, Sass, Compass, Stylus, Jade and much more with automatic CSS prefixing, It comes with built in server for cross browser testing. It runs on Windows, Mac OS X and Linux.
Synchronized Testing. Really
Ghostlab synchronizes scrolls, clicks, reloads and form input across all connected clients. This means what you're testing is not the simple page load, but the full user experience.
Solo is the easiest way to manage your projectsCreate contacts, manage tasks, upload files, track project progress, and keep notes - all in the same place
An open-source GUI prototyping tool that's available for ALL platforms.
Pencil is built for the purpose of providing a free and open-source GUI prototyping tool that people can easily install and use to create mockups in popular desktop platforms.