just from memory, a couple not mentioned so far "The Bells of Hell Go Ting-A-Ling-A-Ling", "I Don't Want to Join the Army" (which caused indignant letters to the Times when a 'gentleman' heard troops singing it on the march. Also if you search the forum for Christmas in the Trenches, there are I think at least a couple of threads about these incidents and the songs of the era.

Pete M