Across the Divide
Specializes in charity challenges, corporate challenges, projects, CSR programmes and expedition management.
http://www.acrossthedivide.com/

Ashoka
Global non-profit organization that invests in extraordinary individuals with unprecedented ideas for change in their communities.
http://www.ashoka.org/home/index.cfm

Big White Box
Buy or sell digital photos online, and help raise money for charity in the process.
http://bigwhitebox.com/

British Heart Foundation
Take part in an active adventure or world experience and raise money to help beat heart disease in the process.
http://www.bhf.org.uk/events/

Charity Challenge
Undertake an adrenaline-pumping physical challenge in any corner of the world, whilst raising vital funds for the charity of your choice.
http://www.charitychallenge.com/

Charity Facts.org
Facts about British charities, their fundraising methods, and other charity-related information and resources.
http://www.charityfacts.org/

Corporate Angel Network
Arranges free air transportation for cancer patients travelling to treatment using empty seats on corporate jets.
http://www.corpangelnetwork.org/

Cruise Industry Charitable Foundation
Find out if the cruise line you have chosen offers charitable assistance to some of the destinations its ships visit.
http://www.iccl.org/foundation.cfm

Directory of Development Organizations
International directory of development organizations.
http://www.devdir.org/

Discover Adventure
DA design and operate bespoke fundraising challenges such as for charity groups and challenging trips for school and corporate groups. Challenges include run treks, cycle rides, horse treks and multi-activity trips all over the world.
http://www.discoveradventure.com/

Gap Aid
A British charity that works closely with the Foreign Office to advise gappers on how to travel the world in a safe and responsible manner.
http://www.gapaid.org/

Global Call to Action Against Poverty
The GCAAP is a worldwide alliance committed to forcing world leaders to live up to their promises and to make a breakthrough on poverty.
http://www.whiteband.org/
http://www.makepovertyhistory.org/

Grameen
A bank that engages in microlending to poor, but entrepreneurial, women in the developing world.
http://www.grameen-info.org/

GuideStar.org
A comprehensive database of nonprofit organizations in the US.
http://www.guidestar.org/

GuideStar.org.uk
Online directory of British charities.
http://www.guidestar.org.uk/

Help The Aged
You Know it Makes Cents: a campaign to encourage travellers to donate their spare foreign currency to the charity.
http://www.helptheaged.org.uk/en-gb/HowYouCanHelp/Recycling/ForeignCurrency/

Hunger Site
Give free food to the hungry with just a click of your mouse.
http://www.thehungersite.com/

ITDG
The organization helps people to use technology in the fight against poverty.
http://www.itdg.org/

Kiva
Kiva lets you connect with and lend money to specific entrepreneurs and small businesses in the developing world.
http://www.kiva.org/

Language Box
Links to major international charities involved in the following fields: human rights, HIV/Aids, mental health, environmental and animal welfare, arms control, health, ethical money, drug and alcohol abuse, disaster relief and cancer.
http://www.languagebox.com/WorldConscience.html

Make A Wish International
Grants wishes to children around the world who are living with life-threatening illnesses.
http://www.worldwish.org/

Make Poverty History
Find out more about this international campaign, supported by Nelson Mandela, for trade justice, debt cancellation, and more and better aid for the world's poorest countries.
http://www.makepovertyhistory.org/
http://www.whiteband.org/

Medecins Sans Frontieres
Independent humanitarian medical aid agency operating worldwide.
http://www.msf.org/

Medicines Global
Medicines Global is a charity that encourages travellers to take extra first aid kits with them on holiday and to donate them to the needy.
http://www.medicinesglobal.com/

Mother Teresa
A dedicated group of volunteer nuns continue the work of bringing God's joy and love to the lives of the sick and suffering that was originally started by the late great Mother Teresa of Kolkata.
http://www.tisv.be/mt/indmt.htm

NABUUR.org
Help communities in the developing world by becoming an online volunteer and gathering information, consulting people and organizations you know, using your creativity, etc.
http://www.nabuur.com/

One Laptop per Child
This revolutionary initiative aims to provide children in developing countries around the world with a $100 laptop for free.
http://www.laptop.org/
http://laptop.media.mit.edu/

One.org
American campaign dedicated to combating global poverty.
http://www.one.org/

Opportunity International
Offers poor entrepreneurs in developing countries training, support, and "micro" business loans to help them break out of poverty and support themselves.
http://www.opportunity.org/
http://www.opportunity.org.au/
http://www.opportunity-canada.ca/
http://www.opportunity.org.uk/
http://www.oid.org/

Orbis
Orbis operates a flying eye hospital that jets around the world eliminating avoidable blindness.
http://www.ukorbis.org/

Oxfam - Cool Planet
Find out more about the charity's work to promote fair trade and a better deal for farmers in developing countries, and to fight global poverty.
http://www.oxfam.org.uk/coolplanet/

Oxfam International
Fighting for a more equitable world.
http://www.oxfam.org/

Oxfam Unwrapped
Alternative gift shop: You pick a useful gift such as a goat, safe water or textbooks. A deserving soul in the developing world receives the gift. Your friend or relative receives a certificate and a fridge magnet representing the gift.
http://www.oxfamunwrapped.com/

Passion 4 Geography.co.uk
Aims to promote awareness of geography as an academic subject, both among students and teachers, and the wider public.
http://www.passion4geography.co.uk/

Plan
Sponsor a child in the developing world and help transform his or her life.
http://www.plan-international.org/

Red Crescent
Islamic version of the Red Cross.
http://www.ifrc.org/

ReliefWeb
Directory of humanitarian organizations worldwide.
http://www.reliefweb.int/w/

Rough Guide - Better World
This website publicizes the efforts of those working to combat hunger, disease and illiteracy around the world, and details what you can do to help. If you wish, you can order a free copy of the accompanying book online.
http://www.roughguide-betterworld.com/

Take It Personally
Launched by Body Shop founder, Dame Anita Roddick, this site highlights human rights abuses, economic injustices and other important issues around the globe, and tells you what you can do to help. Just click on the "Global Action Navigator" for more information.
http://www.takeitpersonally.org/

Tearfund
British based Christian charity helping the world's poor through development projects and campaigns.
http://www.tearfund.org/

The Fairtrade Foundation
Food displaying the FAIRTRADE Mark has been sourced from growers in the developing world who have been paid a fair price for their product - guaranteed.
http://www.fairtrade.org.uk/

The Great Football Giveaway
Buy a ball and it will be given free to kids in Africa to play with.
http://www.thegreatfootballgiveaway.org.uk/

The Hunger Site
The Hunger Site is the world's first online activism site: click on the "Give Free Food" button and, at no personal cost, send food to the hungry in countries like Bosnia, Lebanon, Indonesia, Afghanistan, Honduras, Mozambique, Eritrea and the United States - anywhere there's a need.
http://www.thehungersite.com/

The International Committee of the Red Cross
Helping the needy wherever there is war pestilence or famine.
http://www.icrc.org/

The Tribes Foundation
Aims to relieve the poverty of indigenous communities in areas outside of the UK which are affected by tourism.
http://www.the-tribes-foundation.org/

UN Volunteers
Get involved with a development project without leaving home.
http://www.onlinevolunteering.org/

UNHCR
The United Nations' refugee agency.
http://www.unhcr.ch/

Unicef - Change for Good
Donate your unused foreign notes and coins to a good cause.
http://www.unicef.org.uk/oldcurrency/

Where Will We Go
Search for adventure and cultural holidays where you not only have the time of your life, but also raise funds for a worthy cause.
http://www.wherewillwego.com/

World Vision
Transform lives by sponsoring a child or family in the developing world through this international charity.
http://www.wvi.org/