Sorry if what I'm about to recommend is free, but you can download a songbook from http://www.nor.com.au/community/musicmagic/SongBook1_A-Z.zip

It contains popular songs from circa 1960 plus and included are a number of pop folky songs. Not a bad collection for party pickin. Guitar chords are included, but its real strength is its collection of lyrics that people only half remember. I haven't counted them but there must be a couple of hundred songs in the collection.

Regards
John