Immaculate Mary, Salve Regina, and Holy God we Praise Thy Name to name a few. I know there are more out there but that's all I can think of for now.
Grosser Gott appears in a lot of Protestant hymnals.
The only hymns of Catholic origin that Protestants do not use are the Marian hymns.
I don't think that there is a single hymnal with 4-part setting that includes only
Also interesting to note that a lot of old German hymns (the ones not based on secular songs) are actually based on pre-Reformation tunes.