Accion International
http://www.accion.org/
ACCION International is a private, nonprofit organization with the mission of giving people the financial tools they need - microenterprise loans, business training, and other financial services - to work their way out of poverty. ACCION International's partner microfinance institutions (MFIs) today are providing loans as low as $100 to poor women and men entrepreneurs in 21 countries in Latin America, the Caribbean and sub-Saharan Africa, and in more than 30 U.S. cities and towns. Together, the ACCION Network has disbursed $5.5 billion in microloans to more than 3 million borrowers, 65 percent of whom are women.

Ashoka
http://www.ashoka.org/home/index.cfm
Ashoka is a global nonprofit organization that identifies and invests in social entrepreneurs—extraordinary individuals with unprecedented ideas for change in their communities—to allow them to focus fulltime on their ideas for leading social change in education and youth development, health care, environment, human rights, access to technology and economic development. In addition, its Changemakers.net web site, which focuses on the rapidly growing world of social entrepreneurship, provides inspiration, resources, and opportunities for those interested in social change throughout the world.

echoing green
http://www.echoinggreen.org/
Echoing Green was founded over a decade ago by the leadership of General Atlantic Partners (GAP), a global private equity firm. Echoing Green is unique as a venture philanthropy firm in its approach that encompasses three essential and interdependent elements- the identification of visionary individuals, combined with the support of their new and innovative organizations, and the fundamental and continuing focus upon how the organizations’ work will result in tangible systemic change

Endeavor
http://www.endeavor.org
Endeavor Global, Inc. is a nonprofit organization pioneering a nonprofit model to spur economic growth by offering multi-pronged support to promising business entrepreneurs in emerging markets. Through Endeavor's model, promising entrepreneurial leaders are identified then connected with global and local networks and capacity-building programs designed to accelerate their companies' development.

Yale School of Management
The Goldman Sachs Foundation Partnership
http://www.ventures.yale.edu/
The Yale School of Management - The Goldman Sachs Foundation Partnership on Nonprofit Ventures educates nonprofits about nonprofit enterprise, serves as a mechanism for capitalizing promising profit-making ventures with financial support, and provides intellectual capital to build the practice of social entrepreneurship in the nonprofit sector at-large. Information and guidance on launching nonprofit ventures are available through an Online Resource Center.