What cross-browser testing tools do you use?

They have almost all the versions of browsers. I think they are the industry leader in this segment. Browser stack is not free but you can check it out.

Great tool for testing your web app. Definitely worth buying.

With Browsersync you can easily test your web page on all your different devices and browsers. It's free and open source!

Easily integrates with Slack, Jira, Asana, Trello, etc etc. Good performance, loads of features, great UI, and fast customer support team.

It is an awesome product to use as it has almost every latest and oldest browser. Though it is not free but it is very cheap.