To be honest, I try never to post trial versions of software. I would prefer to point you to something that is free. Although, there are times that I will break my own unwritten rules.
I have used Microsoft Flight Simulator since v1.0 back in the day on an Apple II computer. So if you're a flight simulator fan, you can Download a free trial version of the software and take it for a test flight.
There is also a free hidden flight simulator in the latest version of Google Earth. Then there is other free open source educational programs, games and simulators available too.