I'll go with barbara's list, but I'll add (in no particular order):

Kisses Sweeter than Wine (Weavers version)
Rosebud in June
Mingulay
Goodnight Irene
House of the Rising Sun
Greenfields
Tammy
It was a Very Good Year
Those were the Days
Bells of Norwich
Erev Shel Shoshanim
Dona Dona