The majority of Search Engine Colossus's flags originate from the U.S. Central Intelligence Agency's "The World Factbook"! These include the flags of Anguilla, Aruba, Australia, Azerbaijan, Bahamas, Bahrain, Belarus, Belgium, Burundi, Chad, China, Colombia, Congo, Denmark, East Timor, Ecuador, European Union, Faroe Islands, France, Greenland, Grenada, Guinea, Guyana, Hong Kong, India, Iran, Jamaica, Japan, Jersey, Kuwait, Latvia, Madagascar, Maldives, Mali, Malta, Mauritania, Mauritius, Mayotte, Mongolia, Mozambique, Northern Mariana Islands, Oman, Panama, Papua New Guinea, Poland, Saint Helena, Saint Vincent and the Grenadines, Saudi Arabia, Tajikistan.
A second group of flags used on Search Engine Colossus originate from Wikipedia Commons. These have been placed in the "Public Domain" and they include the flags of Aaland, Abkhazia, Adjara, African Union, Afghanistan, Albania, Altai, Andorra, Antarctica, Aosta Valley, Argentina, Armenia, Austria, Ascension, Azawad, Azores, Balearic Islands, Bashkortostan, Belize, Benin, Botswana, Bougainville, Brazil, British Virgin Islands, Brunei, Bulgaria, Buryatia, Cambodia, Cameroon, Canada, Canary Islands, Central African Republic, Chukotka Cocos Islands, Congo D.R., Crimea, Cuba, Curaçao, Cyprus, Czech Republic, Djibouti, Dominican Republic, Easter Island, Eritrea, European Union, Falkland Islands, French Polynesia, French Southern Lands, Friuli Venezia Giulia, Gagauzia, Galmudug, Gaza/Hamas, Gibraltar, Haiti, Hungary, Indonesia, Iraq, Ireland, Israel, Italy, Ivory Coast, Jordan, Jubaland, Kabardino-Balkaria, Kalmykia, Karakalpakstan, Kazakhstan, Kenya, Kosovo, Kurdistan, Lebanon, Liberia, Libya, Liechtenstein, Maakhir, Macau, Madeira, Malaysia, Martinique, Micronesia, Moldova, Montserrat, Morocco, Mount Athos, Nagorno-Karabakh, Niger, Nigeria, North Cyprus, Norway, Ossetia, Pakistan, Palau, Pashtunistan, Peru, Portugal, Puntland, Quebec, Royal Air Force, Rwanda, Saint Lucia, Sardinia, Serbia, Sierra Leone, Sint Maarten, Slovenia, Solomon Islands, Somalia, Somaliland, South Africa, South Sudan, South Korea, South Tyrol/Trentino, Sri Lanka, Swaziland, Switzerland, Tamil Eelam, Tatarstan, Togo, Transnistria, Tunisia, Turkey, Tuva, Tuvalu, United Arab Emirates, United States, Uruguay, Vanuatu, Venezuela, Vietnam, Vojvodina, Wallis and Futuna, Waziristan, Western Kurdistan, Yakutia, Yemen, Zambia, Zimbabwe.
A third group of flags originate from Dutch Vexillologist and Artist, Mello Luchtenberg. His website is Vexilla Mundi. The following flags are used with his permission and response to his request for donations: Aceh, Adygea, Algeria, American Samoa, Angola, Antigua, Aruba, Bangladesh, Barbados, Bermuda, Bhutan, Bolivia, Bonaire, Bosnia and Herzegovina, British Indian Ocean Territory, Burkina Faso, Cape Verde, Catalonia, Cayman Islands, Chechnya, Chile, Christmas Island, Comoros, Cook Islands, Costa Rica, Croatia, Cyprus, Curaçao, Dagestan, Dominica, East Timor, El Salvador, Egypt, Equatorial Guinea, Estonia, Ethiopia, Fiji, Finland, French Guiana, Gabon, Gambia, Georgia, Germany, Ghana, Greece, Guadeloupe, Guam, Guatemala, Guernsey, Honduras, Iceland, Ingushetia, Isle of Man, Johnston Atoll, Karachay-Cherkessia, Karelia, Khakassia, Kiribati, Komi, Kyrgyzstan, Laos, Lesotho, Lithuania, Luxembourg, Macedonia, Malawi, Mari El, Marshall Islands, Mayotte, Mexico, Midway Atoll, Monaco, Montenegro, Mordovia, Myanmar, Namibia, Nauru, Nepal, Netherlands, New Caledonia, New Zealand, Nicaragua, Niue, Norfolk Island, North Korea, Palestine, Palmyra Atoll, Paraguay, Philippines, Pitcairn Islands, Puerto Rico, Qatar, Reunion, Romania, Russia, Saba, Sahrawi Republic, Saint Kitts, Saint Pierre and Miquelon, Samoa, San Marino, Sao Tome and Principe, Senegal, Seychelles, Sierra Leone, Singapore, Sint Eustatius, Slovakia, Solomon Islands, South Georgia and the South Sandwich Islands, Spain, Sudan, Suriname, Sweden, Syria, Taiwan, Tanzania, Thailand, Tokelau, Tonga, Trinidad, Turkmenistan, Turks and Caicos Islands, Tuvalu, Udmurtia, Uganda, Ukraine, United Kingdom, Uzbekistan, Vatican City, Virgin Islands, Wake Island, Zanzibar.
Colossus creations: San Marino, Srpska
Commonwealth Symbol orginates from the Commonwealth Secretariat website.
ASEAN flag originates from the Association of Southeast Asian Nations (ASEAN) website.