This has been moved to the Wikimedia Foundation blog and will no longer be edited hereMatthew (WMF) (talk) 02:34, 19 June 2012 (UTC)
Maj. Bill Eberhardt touches noses (Hongi) with a Maori warrior during a Powhiri, or welcoming ceremony, at Christchurch, New Zealand
Wikimedia Commons is an important resource for photos and media used on Wikipedia and various sister projects. But it is also an amazing store of images that can be freely used in so many other applications, personal or professional, provided you adhere to the prescriptions in the free licenses used on the media.
We thought it would be a useful exercise to pick a theme and see how many interesting images we could find that fit the theme. After searching for images by the keyword "orange," and "water," we chose to center this photo essay on "greetings." We were delighted to find with the initial search queries of "welcome" and "greeting," that the subject yielded such a diverse range of images. We sought to expand the search by looking at "greetings" itself. According to the article on Wikipedia, a greeting is an act of communication in which human beings (as well as members of the animal kingdom) intentionally make their presence known to each other.
After searching for "greeting" we tried "waving," "hug," "kiss," "haka",peace sign" and several other search terms. Photos on Commons are sorted into many different categories. So if you already found an image related to the theme you are interested in, it can be useful to click on the categories which appear at the bottom of the image page, below the metadata, to find other images on the same topic. As an example for our search, here is the the category for hand waving. If you know a useful category that is missing in the image, you can help Commons by adding it yourself - click "edit" and follow these instructions.
The following gallery shows some of our favorite results, which we've selected for the array of greetings they illustrate, as well as the historic importance or quirkiness they might depict.
Jordon Hu, Communications Intern With assistance from Matthew Roth, Global Communications Manager and Commons contributor InverseHypercube
A Nepalese man demonstrating the "hand wave"
A wave from Prince William of Wales at the wedding with Kate Middleton
Winston Churchill waves to crowds in Whitehall on the day he broadcast to the nation that the war with Germany had been won, 8 May 1945
Tennis player Simone Bolelli waves to the audience at the 2012 French Open
US baseball player Nick Swisher waving
Movie director Ang Lee at the Venice International Film Festival
Sumo wrestlers gather in a circle around the gyoji (referee) in the dohyō-iri (ring-entering ceremony).
The New Zealand All Blacks greeting the French national team with the traditional "Haka."
U.S. President Richard Nixon's iconic wave with victory sign
Iraqi boys giving peace sign Iraqi boys giving peace outside the Amiriya bomb shelter memorial in Baghdad
Peace signs during protests in Yemen
Free hugs on offer in Tokyo
The England National Rugby team participates in a group hug
Wrestlers Magnum TOKYO and Tajiri hug in the ring prior to a tag team match
Basketball players Mike James and Lindsey Hunter embrace
Hillary Clinton embraces Aung San Su Kyi
Donald Tusk hugs Jean-Claude Juncker at the European People's Party Congress in Warsaw
Robonaut, a humanoid robot created by NASA, shaking hands with a human astronaut
President Harry S. Truman greets Josef Stalin at the Potsdam Conference
Photograph shows President Jimmy Carter shaking hands with Egyptian President Anwar Sadat and Israeli Prime Minister Menachem Begin at the signing of the Egyptian-Israeli Peace Treaty on the grounds of the White House
A young girl curtsies as she presents flowers to Queen Elizabeth II on a tour of Australia
Denis Thatcher(husband of U.K. Prime Minister Margaret Thatcher) kisses the hand of U.S. First Lady Nancy Reagan
A child kisses a baby
A wedding photo kiss in Portland, OR, USA
A man kissing a dolphin at Discovery Cove theme park
Vincent Clerc prepares to blow a kiss
Psyche revived by Cupid's kiss, by Antonio Canova
A U.S. Navy Scuba Diver gives a child a high-five
Marco Scutaro of the Toronto Maple Leafs fist bumps his First Base Coach Dwayne Murphy