
All Hands and Hearts (AHAH) is a U.S. 501(c)3 nonprofit organization. The organization's current structure formed in late 2017, when two existing nonprofits, All Hands Volunteers and Happy Hearts Fund merged to become All Hands and Hearts. All Hands Volunteers was founded in September 2005 by philanthropist and businessman David Campbell to provide relief to residents in areas affected by natural disasters worldwide. Happy Hearts Fund, founded by philanthropist and supermodel, Petra Němcová, sought a similar goal, to help communities recover after a disaster event. All Hands and Hearts is based in Mattapoisett, Massachusetts.

The Arxivers sense Fronteres is an organization of archivists headquartered in Barcelona, Spain. It facilitates volunteer efforts to preserve documentary heritage, especially in developing countries.

BAPS Charities is an international, non-religious, charitable organization that originated from the Bochasanwasi Akshar Purushottam Swaminarayan Sanstha (BAPS) with a focus on serving society. This focus on service to society is stated in the organization's vision, that "every individual deserves the right to a peaceful, dignified, and healthy way of life. And by improving the quality of life of the individual, we are bettering families, communities, our world, and our future." BAPS Charities carries out this vision through a range of programs addressing health, education, the environment, and natural disaster recovery. The organization's worldwide activities are funded through donations and are led by a community of over 55,000 volunteers who are mostly members of BAPS. The volunteers work with local communities and other charities and the organization's activities are mainly based out of their mandirs.

Camps International Ltd is an international volunteer travel operator headquartered in Ringwood, Hampshire UK and Dubai, UAE. Camps International build permanent volunteer accommodation camps within Kenya, Tanzania, Uganda, Malawi, Borneo, Cambodia, Ecuador and Peru. Its products include gap year volunteer trips, adventure expeditions and educational volunteer expeditions for UK and UAE school groups.

Central American migrant caravans, also known as the Viacrucis del Migrante, are migrant caravans that travel from Central America to the Mexico–United States border. The largest and best known of these were organized by Pueblo Sin Fronteras that set off during Holy Week in early 2017 and 2018 from the Northern Triangle of Central America (NTCA), but such caravans of migrants began arriving several years earlier, and other unrelated caravans continued to arrive into late 2018.

Crisis mapping is the real-time gathering, display and analysis of data during a crisis, usually a natural disaster or social/political conflict. Crisis mapping projects usually allows large numbers of people, including the public and crisis responders, to contribute information either remotely or from the site of the crisis. One benefit of the crisis mapping method over others is that it can increase situational awareness, since the public can report information and improve data management.

The Digital Humanitarian Network is a consortium allowing Volunteer and Technical Communities (V&TCs) to interface with humanitarian organizations that seek their services.

DOCARE International is a non-profit medical outreach program that brings health care to underserved communities in remote areas of the Western Hemisphere. DOCARE International provides health care services through permanent medical clinics and short-term outreach trips. DOCARE International has worked in countries such as Haiti, Guatemala, Nicaragua, Haiti, Peru, India, Malawi, Uganda, and Tanzania. DOCARE International operates three permanent clinics, two Guatemala and one in Chacraseca, Nigaragua.

Geekcorps is a non-profit organization that sends people with technical skills to developing countries to assist in computer infrastructure development.

Hatzalah is a volunteer emergency medical service (EMS) organization serving mostly areas with Jewish communities around the world. Most local branches operate independently of each other, but use the common name. The Hebrew spelling of the name is always the same, but there are many variations in transliteration, such as Hatzolah, Hatzoloh, and Hatzola. It is also often called Chevra Hatzalah, which loosely translates as "Company of Rescuers", "Group of Rescuers", or "Rescue Squad".

Hindu Swayamsevak Sangh is a sister organization to Rashtriya Swayamsevak Sangh (RSS) for supporting and mobilising Hindus living outside India. It was founded in 1940s in Kenya, it is currently active in 156 countries and boasts 3289 branches.

International Volunteer HQ Limited (IVHQ) is a New Zealand-based volunteer travel company founded by Daniel John Radcliffe in 2007. As of September 2015, it has sent 50,000 volunteers overseas to 30 countries on 200 different projects. In November 2017, the Sydney investment company Mercury Capital acquired a majority stake in IVHQ.

InterVol is a community volunteering charity based in the United Kingdom. InterVol support poverty reduction, conservation and education projects globally, as well as community volunteering based on university campuses in the United Kingdom. The charity is based at the University of Birmingham, Imperial College London, Lancaster University, University of Nottingham, and Oxford Brookes University.

The Jesuit Volunteer Corps (JVC) is an organization of lay volunteers who volunteer one year or more to community service with poor communities. JVC works in inner city neighborhoods and rural communities in about 36 different cities throughout the U.S. JVC works with the homeless, abused women and children, immigrants and refugees, the mentally ill, people with HIV/AIDS and other illnesses, the elderly, children, and on behalf of other marginalized groups. Jesuit Volunteers (JVs) in the international program that places volunteers in other countries.

The Karen Hilltribes Trust (KHT) is a charity based in the United Kingdom "dedicated to working with the Karen people of Northern Thailand to help them build a better future for themselves". The trust is a registered charity with key aims of improving health, increasing access to education and securing better livelihoods for the Karen.

Liter of Light is an open source design for a low-cost light tube that refracts solar light to provide daytime interior lighting for dwellings with thin roofs. Daylighting is cheaper than using indoor electric lights during the day. The device is simple: a transparent two-liter bottle is filled with water plus a little bleach to inhibit algal growth and fitted into a hole in a roof. The device functions like a deck prism: during daytime the water inside the bottle refracts sunlight, delivering about as much light as a 40–60 watt incandescent bulb to the interior. A properly installed solar bottle can last up to 5 years.

Médecins Sans Frontières, sometimes rendered in English as Doctors Without Borders, is an international humanitarian medical non-governmental organisation (NGO) of French origin best known for its projects in conflict zones and in countries affected by endemic diseases. In 2019, the group was active in 70 countries with over 35,000 personnel mostly local doctors, nurses and other medical professionals, logistical experts, water and sanitation engineers and administrators. Private donors provide about 90% of the organisation's funding, while corporate donations provide the rest, giving MSF an annual budget of approximately US$1.63 billion.

The RINJ Foundation (RINJ) is a Canadian incorporated global not-for-profit health care-related non-governmental organization women's group listed with the United Nations as an NGO with "a mission while supporting and medically caring for survivors, to also gather and compile detailed information on parties to armed conflict that are credibly suspected of committing or being responsible for acts of rape or other forms of sexual violence."

The Society of St Vincent de Paul is an international voluntary organization in the Catholic Church, founded in 1833 for the sanctification of its members by personal service of the poor.

TECHO, also known as Un Techo para mi País (UTPMP), is a nonprofit organization that mobilizes youth volunteers to fight extreme poverty in Latin America, by constructing transitional housing and implementing social inclusion programs. It was founded by a Jesuit priest, and working with more than 720,000 volunteers, it has constructed houses for over 102,400 families in 19 countries in Latin American and the Caribbean and 2 offices located in Miami, Florida, US, and London, England, that work as funds hubs.

Buddhist Compassion Relief Tzu Chi Foundation, Republic of China, known for short as the Tzu Chi Foundation, is a Taiwanese international humanitarian and nongovernmental organization (NGO). The foundation has several sub-organizations such as the Tzu Chi International Medical Association (TIMA) and also the Tzu Chi Collegiate Youth Association. Tzu Chi volunteers and relief workers are mostly recognizable by their blue and white uniforms called, in Chinese: 藍天白雲; lit. "blue sky, white clouds"). The foundation's work includes medical aid, disaster relief, and environmental work such as recycling. It is operated by a worldwide network of volunteers and employees and has been awarded a special consultative status at the United Nations Economic and Social Council.

The United Nations Volunteers (UNV) programme is a United Nations organization that contributes to peace and development through volunteerism worldwide.

Voluntary Service Overseas (VSO) is a not-for-profit international development organization charity with a vision for "a fair world for everyone" and a mission to "create lasting change through volunteering". VSO delivers development impact through a blended volunteer model consisting of international, national, and community volunteers working together to develop the systems and conditions for positive social change In 2018–19, VSO worked in 23 countries in Africa and Asia

Volunteer Service Abroad - Te Tūao Tāwāhi (VSA) a New Zealand-based volunteering agency working in international development.

The Women's Radio Corps (WRC) was established by Edna Owen and an advisory council during World War I. The aim of this branch of the US Army Signal Corps was to recruit women to train as wireless operators, in order to replace male wireless operators who had gone to war. The activities of the Corps converged with the wartime wireless activities and training of the National League for Women's Service whose training classes were directed by Owen.

World Friends Korea is a South Korean government-run overseas volunteer program that was inaugurated on May 7, 2009. Prior to this program, the South Korean government conducted various types of volunteer programs under three different government ministries. As establishing "World Friends Korea", the government of Korea aims in unifying the different programs under a single overseas volunteer system. The program is similar to the American Peace Corps program.