Where to find donations for a non governmental organization?

If you have already established a nonprofit organziation, you can apply for government grants, foundations, or corporate sponsorships, and soliciti donations from the general public. If you have not establshed a nonprofit organization yet, that is your first step. There are already many nonprofit organziations covering a wide range of social issues, so if you do a little research, you will very likely find an organization that is already doing the work you are interested in supporting, and you can ist them in their efforts rather than founding a competitng charity.