https://www.gefkc.org - Focuses on providing free educational support and services to underserved communities. Their programs include workshops, academic support, and more!
http://www.minorityaccess.org/ - "Assists individuals, academic institutions, Federal, state, and local government agencies, and corporations of all kinds in diversifying their campuses and work sites."
https://worlded.org/ - Works globally to provide education and training resources for economically marginalized communities. They focus on youth and adult education, skill development, and poverty reduction.
https://www.onegoal.org/ - An organization aimed at helping students from low-income communities achieve a college degree. They offer coaching, resources, and support throughout the college application process.
https://matriculate.org/ - a mentoring service for high-achieving low-income high school students to increase their chances to get into and attend college.