I accidentally started a signature flag fad. Thus of course a thread must follow (mainly so we don't flood other threads).
Most of these flags are 21x14 pixels.
1. Sexuality/Gender flags: (I was surprised how many bi/gay people are on bay12, and how little of them know about others O:)

- flag of LGBT Community, mostly Homosexualism

- flag of Bisexualism // Just added a black frame in Scelly9's flag


- flag of Pansexualism

- flag of Asexualism and related concepts

- flag of Polyamory

- flag of Transgenders

- one of proposed flags of Heterosexualism

- Male flag

- Female flag
2. Nationality flags:
- Flag of Algeria

- Flag of Armenia

- Flag of Australia

- Flag of Austria

- Flag of Azerbaijan

- Flag of Belarus

- Flag of Belgium

- Flag of Brazil

- Flag of Canada

- Flag of China

- Flag of Croatia

- Flag of Cuba

- Flag of Denmark

- Flag of Egypt

- Flag of Estonia

- Flag of Ethiopia

- Flag of Finland

- Flag of France

- Flag of Georgia

- Flag of Germany

- Flag of Greenland

- Flag of Iceland

- Flag of India

- Flag of Indonesia

- Flag of Iran

- Flag of Ireland

- Flag of Israel

- Flag of Italy

- Flag of Japan

- Flag of Kazakhstan

- Flag of Kyrgyzstan

- Flag of Laos

- Flag of Latvia

- Flag of Lebanon

- Flag of Lesotho

- Flag of Liberia

- Flag of Libya

- Flag of Liechtenstein

- Flag of Lithuania

- Flag of Luxembourg

- Flag of Macedonia

- Flag of Madagascar

- Flag of Malawi

- Flag of Malaysia

- Flag of Maldives

- Flag of Mali

- Flag of Malta

- Flag of Marshall Islands

- Flag of Mauritius

- Flag of Mauritania

- Flag of Mexico

- Flag of Micronesia

- Flag of Moldova

- Flag of Monaco

- Flag of Mongolia

- Flag of Montenegro

- Flag of Morocco

- Flag of Mozambique

- Flag of Myanmar

- Flag of Namibia

- Flag of Nauru

- Flag of Nepal

- Flag of the Netherlands

- Flag of New Zealand

- Flag of Nicaragua

- Flag of Niger

- Flag of Nigeria

- Flag of North Korea

- Flag of Norway

- Flag of Oman

- Flag of Pakistan

- Flag of Palau

- Flag of Palestine

- Flag of Panama

- Flag of Papua New Guinea

- Flag of Paraguay

- Flag of Peru

- Flag of Philippines

- Flag of Poland

- Flag of Portugal

- Flag of Puerto Rico

- Flag of Qatar

- Flag of Romania

- Flag of Russia

- Flag of RUSSIA STRONG

- Flag of Rwanda

- Flag of Saint Kitts and Nevis

- Flag of Saint Vincent and the Grenadines

- Flag of Samoa

- Flag of San Marino

- Flag of Sao Tome and Principe

- Flag of Saudi Arabia

- Flag of Senegal

- Flag of Serbia

- Flag of Seychelles

- Flag of Sierra Leone

- Flag of Singapore

- Flag of Slovakia

- Flag of Slovenia

- Flag of Solomon Islands

- Flag of Somalia

- Flag of South Africa

- Flag of South Korea

- Flag of South Sudan

- Flag of Spain

- Flag of Spain (+coat of arms)

- Flag of Sri Lanka

- Flag of Sudan

- Flag of Suriname

- Flag of Swaziland

- Flag of Sweden

- Flag of Switzerland

- Flag of Syria

- Flag of Taiwan

- Flag of Tajikistan

- Flag of Tanzania

- Flag of Thailand

- Flag of East Timor

- Flag of Togo

- Flag of Tonga

- Flag of Trinidad and Tobago

- Flag of Tunisia

- Flag of Turkey

- Flag of Turkmenistan

- Flag of Tuvalu

- Flag of Uganda

- Flag of Ukraine

- Flag of United Arab Emirates

- Flag of the United Kingdom

- Flag of the United States of America

- Flag of Uruguay

- Flag of Uzbekistan

- Flag of Vanuatu

- Flag of Vatican city

- Flag of Vietnam

- Flag of Venezuela

- Flag of Western Sahara

- Flag of Yemen

- Flag of Zambia

- Flag of Zimbabwe
3. States, regions and other administration units:
- Northern Carolina (US state)

- Southern Carolina (US state)

- Washington (US state)

- Maryland (US state)

- Michigan (US state)

- Texas (US state)

- Flag of Sami

- Flag of Fenno-Swedes and Scania

- Flag of Frisia

- Flag of Wales

- Some city flag?

- Olympia city flag (US, not Greek)

- Flag of USSR

- Flag of pre-Great War USA (Fallout games)

- Like above, damaged

- Flag of Brest city (Belarus)

- New California Republic (Fallout: New Vegas)

- Flag of Gdańsk city (Poland)

- Flag of Scotland

- Flag of England

- British Columbia (Canada)

- Alberta (Canada)

- Saskatchewan (Canada)

- Manitoba (Canada)

- Ontario (Canada)

- Quebec (Canada)

- New Brunswick (Canada)

- Prince Edward Island (Canada)

- Nova Scotia (Canada)

- Newfoundland and Labrador (Canada)

- Flag of Vinland (discovered by Leif Eriksson)
4. Religion and Philosophical Doctrines Flags:

- Atheism flags


- Flags of Christianity

- Chi Rho, one of Christianity flags

- Hindu 'aum' symbol

- Buddhism flag

- Judaism flag

- Islam flag

- The Slavic Pagan symbol of the sun a.k.a. Kolovrat.

- Red Kolovrat

- Slavic Pagan "Hands of God" symbol

- Flag of Russia + Orthodox Cross

- Taoism flag

- Buddhist Flag

- Transhumanist flag
5. Political Flags:
- Flag of Anarchism

- Flag of Communist Anarchism

- Flag of Communism

- Flag of Green party

- Flag of Pirate party

- Anti-flag flag!

- Spanish Republican Flag

- Spanish Francoist Flag

- American Republican Flag
6. Organizations, Empires and such Flags:
- Flag of the European Union

- Flag of North Atlantic Treaty Organization

- Flag of Peaceful Syrian Protesters™ a.k.a Free Syrian Army

- Flag of Byzantine Empire
7. Dwarf Fortress Flags:




8. Other Flags:
- the Jolly Roger pirate flag, mini-rendition of Yoink's flag


- Flag of Earth

- Flag of Earth

- Flag of UN/Federation? (Star Trek)

- Humanism flag

- Prismatic flaggerflag

- OHGODSWHY


- Kamina group flag?





- Some Nordic symbols (Thor's hammer Mjölnir, Tiwaz, Thurisaz, Odal, Algiz)

- Nordic countries gif

- Hacker Emblem/Floater

- Hiigaran Flag

- CORE Flag

- ARM Flag

- Flagmaker flag?

- Flag of Mordor

- Olympic Flag

- Furry Flag

- Metal Flag

- Black Flag Flag

- Metal Flag 2

- Some kind of Bionicle Flag

- The emblem of the Imperium of Man

— Flag of the Brotherhood of NOD,

— Flag of Oceania from the film version of Nineteen Eighty-Four.

- Spehss mahreen

- Chaos in your sig corrupting your d00dz

- NOBODY EXPECTS THE -I-

- Necrons

- Vegetarian Flag?

- Lannisters of Casterly Rock (Song of Fire and Ice)

- Baratheons of Dragonstone (Song of Fire and Ice)

- Starks of Winterfell

- Death Metal flag








- My Little Pony: Friendship is Magic flags
CREDITS LIST: Aka those who made above flags!
Barbarossa TSG; cameron; ChairmanPoo; da_nang; DarkWolfXV; Detonate; Draxis; Dsarker; Furtuka; Guardian G.I; Haspen; Hubris Incalculable; Loud Whispers; mainiac; MaximumZero; Nega; NobodyPro; Phantom of the Library; rutsber; Sheb; Svarte Troner; and others thorough the thread
Note: Please refrain yourselves from arguments about sexualities, politics and religion. This is flag thread, not flamewar thread.
Note2: There's a one-image limit for images in signatures. If you want several flags in your sig, just glue them together in any graphics program
Note3: If you don't see any flags in signatures, then go to 'Profile', then 'Look and Layout', and check the 'Show images within post signatures' option.
Not4: If you want to show your own flags, for the love of [your deity here, if any], don't upload to imageshack! The links are huge, go with imgur or tnypic or something like that.