If you are interested in supporting underserved populations, the Shephard Higher Education Consortium on Poverty (SHEP) works with students across a number of schools. I’ve linked the page to the partner schools, many of which offer generous merit (some more competitive than others). SHEP provides funded internship opportunities to students in the program.
Shepherd Consortium Member Schools
Another organization focused on civic engagement and community support is the Bonner Foundation. Many schools offer scholarships through the Bonner Program. Link to the partner schools below.