Review on Payara Server by Michael Schwegman

I like that it's open source, so we can contribute back to its development whenever necessary or needed by us while also being able to use all of its features without having to pay for them ourselves (so far).

The interface is easy enough as well if you're familiar with Java, but newbies might have some difficulty at first getting their head around how everything works. It has been very useful in our organization where most people are not technical savvy and this helps get things done quickly since they don't need much training time when using it. The ability to host multiple applications within one server instance makes managing servers easier than before.