Ghostlab!

Browsersync makes your browser testing workflow faster by synchronising URLs, interactions and code changes across multiple devices. It’s wicked-fast and totally free.

Adobe Edge Inspect is for web designers and developers who are targeting mobile browsers. After installing Edge Inspect on your computer, you’ll be able to pair your devices, have them browse in sync with your computer, and perform remote inspection and debugging so you can see HTML/CSS/JavaScript changes instantly on your device.

DOMScope is an online web inspector and debugger for mobile web apps. Like Chrome's DevTools, it allows developers to navigate through the HTML, list applied CSS styles and execute JavaScript code inside any device's browser. Unlike DevTools, DOMScope isn't tied down to a single OS or browser and works cross-platform.

Muir is a mobile browser testing app without all the strings of cloud based suites. Simply download the desktop app, install the client on your mobile devices, and get to work.- Browse to any web page in Chrome or Firefox. Your mobile devices will follow suit instantly.- Test responsive designs as you develop. See how each device renders your site.- Connect as many devices as you want via Wi-Fi, and have them all sync to your browser.