I have a set of basic Scottish session tunes on my website, in ABC:

http://www.campin.me.uk

Most of them are fairly easy.

thesession is entirely Irish (except for the rather large fraction of tunes from other places mislabelled as being Irish). It doesn't separate out a category for easy or generally familiar tunes. It also has a weird policy that you *aren't allowed to state the composer of a tune* in the ABC. They actually *prefer* misinformation. I'd never submit anything to it.

BTW I haven't heard Winster Gallop in a session for several years. I've never heard Cripple Creek played live and would be amazed if any other session player here recognized it - I'm in south-east Scotland. Repertoires vary a lot by location.