Takana is a great prototyping and development tool which is pretty impressive. It lets you see your SCSS and CSS style changes live in your web browser, as you type them. Its an open source.
As you change styles in your editor you can see changes straight away in your web browser which saves a lot of time during web development process. It does work with all the browsers.
Getting started with Takana is very simple.
see the steps to install Takana in their official site