A recent episode of Dispatches on British T.V. highlighted the plight of children who have been accused of witchcraft in Nigeria.
Many volunteers from Nigeria and elsewhere are fighting this by supporting the children and educating those who would hurt them.
One such organisation is SteppingStonesNigeria: http://www.steppingstonesnigeria.org/howtohelp
People can help this organisation by donating old mobile phones for recycling and laptops for volunteers to use.