Along with a number that have already been mentioned, "To Celia", "Cape St. Mary's", "Poor Wayfaring Stranger", "Flow Gently, Sweet Afton", "Swing Low, Sweet Chariot" (a pattern?), "Adeste Fideles", and many others.

And also a version of "Turtledove"/"10,000 Miles" in a songbook my mother has. I thought I found the tune in the DT, but I can't any more. Maybe it's "He's Gone", the tune of which seems to be broken. The best part is something like

X: 1
T:Fare Thee Well
M:4/4
L:1/4
Q:1/4=100
K:F
z3C|FAA3/2G/2|F2z1F|Ac_e3/2d/2|c2z1F|Aced|cd/2c/2AF|F_DF2||

(Oh who will shoe your foot,/ And who will glove your hand,/ And who will kiss your red ruby lips while I'm away?)