Blisk is a free web browser, at least in name. It's tailor-made to test the web readiness of websites, from their HTML coding to advanced applets inside of them. It offers several features useful for this purpose, such as automatically refreshing the displayed page when it's changed, and more powerful tools for web developers both new and old.
It's hard to overstate just how useful automatically refreshing the page is. Blisk does this whenever a source file is changed, meaning that you can see the changes you make to a web page displayed in the browser in nearly real time. This saves a click and a couple seconds each time you use it, but working on a web page, that saved time adds up very quickly. It's particularly effective if you have more than one monitor. Of course, Blisk includes support for mobile websites, too: it would be a much weaker offering if it didn't. Blisk's most advanced feature is probably the debugging DevTools it provides, which debug websites in both desktop and mobile form.
Work At A Brisk Pace
Top that off with strong support for different languages and frameworks, and Blisk is worth a try for any web developer who feels like their current testing methods aren't working as well as possible. The only caveats are that the browser itself is poor for hopping from page to page, and that using multiple 'devices' takes getting used to.