Personally I prefer the freeware "anvil stuidio". It'll play midis just fine (with the right soundcard/midi hook up).

I use the compose page to enter the sheet notation of folk tunes and then sit back to hear what they sound like.

There's a cut down free version, and an all whistles and bells bought version. I find the free wersion good enough for my needs.

It's available from so many sites that a google is recommended to get a copy

Barbara