If you don’t know Tom Lehrer, you should! He was an amazing musical parodist/comic — perhaps the finest who ever lived, although (IMHO) some of the modern crop (Bo Burnham, Bill Bailey, Tim Minchin) give him a run for the money. A good starting point is his famous 1967 concert in Copenhagen, available in full on YouTube.
Anyway, he released all his music — recordings, sheet music, everything — into the public domain in 2022, at tomlehrersongs.com. “Mike Z.” made it easy to mirror this site on their github page, so I did just that. My mirror is at https://tomlehrer.tgeller.com. Enjoy!
(My family has some connection to Mr. Lehrer, by the way: My parents were students in the Boston area when he was first making a splash. I believe they got to see him perform during this time, and I grew up with his albums playing during dinner.)