Korean Language

http://area51.stackexchange.com/proposals/31223/korean-language-usage?referrer=k2j_WCXXwWfN9-AGmzEdWw2

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http://leonsplanet.com/korean_origins.htm

Leon's theory about the origin of Korean language

http://ko.wikipedia.org/wiki/%EA%B5%AD%EB%A6%BD%EA%B5%AD%EC%96%B4%EC%9B%90

Wikipedia on National Institute of the Korean Language

http://www.korean.go.kr/09_new/index.jsp

National Institute of the Korean Language (NIKL)

http://www.malteo.net/

An effort by NIKL to change many foreign loanwords into pure Korean words

http://www.hangeulmuseum.org/

Hanguel Museum

Hanja (漢字)

http://hanjadic.bravender.us/

A generic? Hanja dictionary

http://hanja.naver.com/

One of the best

http://dichanja.edupia.com/index_hanja.asp

Shows stroke order, etymology, good as beginner and intermediate reference; limited number of characters