
The Smithsonian Institute is known as the world's largest museum, education, and research complex. Volunteers transcribe documents to make them more accessible for public use.

The Zooniverse is home to many successful and well-known citizen science projects done by professional researchers. Volunteers can choose to participate in projects spanning different fields such as biology, astrology, languages, climate, and arts.

Hosted by the World Food Programme, Free Rice is a website that allows you to answer a variety of trivia questions of your choosing, with correct answers equating to rice donated by their organization.

UNICEF hosts this ongoing challenge to raise money for their organization. Play as many 1 minute rounds as you want, comprising of simple math questions. For each question you get right, $0.25 is sent as a donation to UNICEF.

A great way to have food donated to various food drives around the nation, all through answering basic trivia questions from the comfort of your computer or device.