Flags
Honor the Flag
[ http://www.honorflags.com/ ]
Information on how and when the US flag should be flown at half-mast. Includes FAQ, flag code and email alerts.
Flag Institute
[ http://www.flaginstitute.org/ ]
Research and documentation center for flags offering a range of vexillological services to HM Government in the UK and worldwide organizations. Also includes library, news, publications, meetings and online store.
North American Vexillological Association (NAVA)
[ http://www.nava.org/ ]
Non-profit, volunteer organization promoting research into the origins, history, and symbolism of flags. Also offers meetings, publications, news, membership information, online application form and store.
World Flags
[ http://world-flags.info/ ]
Providing a range of information about the country such as flag, area, capital, language and currency. Also includes images, t-shirts, downloads and wallpapers.
World Flag Database
[ http://www.flags.net/ ]
Features flags images and country information such as location, status, population, area, currency, language, religion and map. Also offers online shop and books.