No fewer than four folkies of my acquaintance have set Arthur O'Shaunessy's "Ode" ("We are the music makers") -- Bob Zentz, Jake Walton, Lorraine Hammond, and me. In fact, one Getaway, we had a "print to voice" workshop with Bob, Lorraine, and me, each doing their version in the first round of the workshop. Very interesting, in that each of us did something different -- Lorraine used 3/4 time, Bob put the middle stanza as a bridge, and I used the first stanza as a chorus.
I have set a couple of Kipling poems to non-traditional tunes, as well. One, "The Bell Buoy," I gave up on -- it didn't work -- but the tune got used for one of my originals. The other, "Prodigal Son -- Western Version," I still sing.
I could probably find others in my songbag, but can't call them to mind.