What is the best alternative to PhantomJS?

There are times where you don't want to open up a browser for screencaps, that is where CasperJS comes to use, it can render the page using its own rendering engine and take and save a screenshot for you, all via the commandline

Since all webdevs know JS, the start-up time of learning the framework will be reduced to zero, as your team can be productive from day one.

The WebDriver protocol is standardized by the World Wide Web Consortium which makes it easy for third-parties to get involved and contribute to Selenium. WebDriver has been the foundation of many additional automation projects besides core selenium and has become the de-facto standard for UI autom...

Selenium, with its ability to interact with different testing frameworks, like NUnit or xUnit, makes it easy to get Selenium working with practically any Continuous Integration services.

Supports many browsers and a solid platform for adding future browsers to selenium (WebDriver)

Zombie is built on node.js, making it very easy to integrate with your project and into your testing toolchain. It only requires JavaScript to run.

The way the api is built makes it very easy to add to your test framework.

It's a lot faster than fully fletched browsers and a lot lighter. Partly because it really only focuses on headless loading of pages along with their JavaScript (not taking really care of rendering or more visual resources).

The integration of Node with the DOM in NW.js opens up a number of new options in how your headless testing workflow can be facilitated. The distinct separation of JavaScript contexts, the introduction of a separate node context, and the ability to cross communicate, offers a lot of power and flex...

Access to the Native Client offers up more options in implementing your testing workflow.

It is not constrained to a single device, it works across desktop and mobile devices at the same time. It will update code changes, synchronize scroll positions and form inputs automatically across all browsers and devices.

When filling out a form in one browser, same information will be repeated in other browsers.

Browser-Sync has been tested to work with desktop (Chrome, Firefox, IE 7-10, Safari, Opera) and mobile (Android, iOS, Windows Phone, Opera Mobile, Firefox Mobile) browsers.

With the new release (as of Dec 6th 2016), you can save a group of "Sessions" with logins stored to a Project, which you can launch with the click of a button. "Projects" eliminates the need to spend time setting up your workflow every day, so you can get right to work.

Tabs can be grouped under a single tab to easily keep track of all open webpages.

Since Vivaldi is built on Chromium, the same base as Chrome (among other browsers) is built on, it was possible for Vivaldi developers to allow Chrome extensions to run in their browser.

Vivaldi includes lots of niche functionality such as the ability to move tabs to any side of the screen, turn images on and off, or render pages with monospace fonts.

Unlike Google Chrome, Chromium is completely open source.

As Chrome is based on Chromium they overlap in supported features. Chromium syncs between devices, automatically updates, has great built-in developer tools, installs extensions without a restart, includes a combined text bar for entering URLs and searching and has excellent HTML5 compatibility ju...

Chrome and Chromium are available on almost every device nowadays

It's possible to add own filter lists. The internal adblocker is faster than any external.

Since Opera is built on WebKit, the same engine Chrome (among other browsers) is built on, it was possible for Opera developers to allow Chrome extensions to run in their browser.

You can pop-out any video and it will stay on top while you are surfing on other tabs.

Firefox scores strongly on HTML5 feature support.

Firefox is available as a free download. All Mozilla software is licensed under the Mozilla Public License. Instructions on how to obtain the source code can be found here.

Firefox Sync is an optional feature in Firefox that allows syncing bookmarks, passwords, and add-ons between devices.

By logging into Chrome using a Google account it's possible to sync history, extensions, passwords, bookmarks and other settings between devices. This makes it great for anyone working with multiple devices as it allows experiencing consistent context when in the browser.

As of February 2015, Chrome scores highest of all browsers for HTML5 compatibility.

The rendering of the pages and the browser compatibility with OSX works smoothly, when compared to other browsers. Also you get very high battery life with Safari, when compared to Chrome.

Tabs, passwords, bookmarks and, history all sync across devices.

Doesn't need any additional software or browser extensions to be installed on any device. If every device is pointed to the IP address that it provides it will automatically reload that page on every file change.

Ghostlab offers a testing page which when opened displays a lot of useful information. Such as, but not limited to: viewport width and height, user agent string, pixel ratio etc...

Every time the page is reloaded on a device, it's automatically reloaded on every other device connected. It also registers scrolls, form inputs and clicks across different devices and automatically synchronizes them to each connected device.