The document lists and provides brief descriptions of 17 top national workforce development nonprofits in the United States. Some of the nonprofits mentioned include the National Skills Coalition, which advocates for policies to invest in workforce training; CLASP, which seeks to improve lives of low-income people; and Jobs for the Future, which helps communities and states compete globally through education and workforce strategies. Overall, the nonprofits listed aim to enhance employment opportunities, skills training, and economic prosperity through various initiatives.