Wow.....  great find @AnnyJ - thanks for sharing that 

EDIT:  Almost two hours later ( ! ) I've been reading through that - and - from one of the embedded links I followed I uncovered this - 

http://www.joe-offer.com/folkinfo/   - this is a repository copy of the now-closed folkinfo.org database

It contains a very substantial collection of tunes, and all ( well, like the 15 or so I looked at out of the many hundreds, if not over 1000) are presented in three formats - ABC notation, MIDI (very simple with melody on piano only), and a PDF score sheet.   Oh - for those that like to sing along - it also has lyrics (yayyyy) and short historical notes about the song.

I only draw this to folks attention for those who are starting-off on their musical journey - and are maybe struggling with trying to learn too many things at the same time - so finding a tune in ABC format, with a simple player will get you familiarized with the tune really quickly.   Although the the ABC format has its place in that regard, personally, I rarely use it (and then only to have a quick-listen to the occasional tune I come across in the internet that is only "scored" in ABC format).  If I like it and want to keep it to work on, I'll score it up properly in MuseScore.