Frankel has also written libretti for two oratorios composed by Andrea Clearfield, "Women of Valor" and "The Golem Psalms." The first was premiered in Los Angeles in 2002; the second in Philadelphia in 2006. Her most recent opera, with composer Leonard Lehrman, is "The Triangle Fire," based on the 1911 Triangle Shirtwaist Factory Fire in New York. The opera will premiere at the American Labor Museum on September 4, 2016. She is also developing an opera libretto based on Karel Capek's science fiction classic, "R.U.R."