Ecosia
Each free web search saves about 2.4yd of rainforest. It is also a totally green website so it's great for the environment.

EasySearch
UK search engine. 50% proceeds go to charity.

Blackle
Blackle does not donate money to charity. However, since the page is black, the user's computer monitor uses less energy.

GoodSearch
50% goes to charity (about 0.01 for each search)

TakePart
TakePart.com was an independent online community that connected its members directly to the issues that inspired them to engage, contribute and take action. The site is no longer active, but an archive of past posts remains available.

Participant
Participant was founded in 2004 by social entrepreneur Jeff Skoll, with a commitment to creating content that stands at the intersection of art and activism. As the leading global media company dedicated to entertainment that inspires audiences to engage in positive social change, Participant partners with key nonprofits and NGOs to drive real-world impact and awareness around today’s most vital issues on a global scale.

FlipGive
FlipGive offers a suite of free apps for teams and charities to make and manage money. Teams earn cash back toward expenses, balance the budget, accept fee payments, open an account through us, and more. People save time and energy while lowering the cost.

Love My Charity
A place where people can sell things for their charity or search and buy other items in which the seller is giving proceeds to charity. A simple and easy way to earn money for your charity.

The Vegetarian Site
Shop for vegan products, with 5% going to animal charities. Flat-rate 5$ shipping on all orders in the continental United States.

Give as you Live
Give as you Live Online was launched in 2010 to provide an easy way to raise free funds for charity just by shopping online.

GridRepublic
GridRepublic members run a screensaver that allows their computers to work on public-interest research projects when the machines are not otherwise in use. This screensaver does not affect performance of the host computer any more than an ordinary screensaver does.

Change.org
Change.org is a social action platform that empowers anyone, anywhere to start, join, and win campaigns for social change. Millions of people sign petitions on Change.org each month on thousands of issues, winning campaigns every day to advance change locally and globally.