Here is a really interesting article detailing the service available at DistroTest.net from where you can try many OS distributions from within a browser, for free and without having to download or install ISO files. There is an impressive level of business-like cloud virtualization happening behind the scene to make all this happen.
I was able to spin up an instance of antiX 17.4 Basic directly in Chrome but patience was required as it took minutes before fully started. This is all based on live sessions of these distros and there is a bit of cursor lag but nonetheless is an effective and simple way of trying different operating systems. Happy computing!
Windows & Tech Corner 
Have a look to OnWorks, another website where you can run Linux online distributions sich as Ubuntu, Fedora, CentOS, … and so on.
Thanks and sorry for the delayed reply.