Islamic Relief is to receive its first long-term funding from the Department for International Development.
It is among eight UK-based organisations given core funding of between £500,000 and £2m a year. One World Action and World Vision also benefit.
A non-UK NGO, anti-corruption body Transparency International, will also receive money.
The grants, worth £44m over five years, take the number of programme partnership agreements DfID holds with NGOs to 26. Existing agreements fund the UK aid agency elite, including Oxfam and Save the Children.
DfID says the new agreements are part of efforts to achieve the Millennium Development Goals. "Each of DfID's new partner organisations has strong links in the countries where they work and established reputations with the people there," said Gareth Thomas, international development minister.
"Working in partnership backed by these new funds is an effective way to achieve global poverty reduction."
Transparency International is given £1m a year to continue its work of increasing awareness of corruption and improving contracting standards between governments and the private sector.