http://www.languages-on-the-web.com/links/link-croatian.htm 
Croatian language - The most comprehensive Croatian language resources related site

http://www.hr/hrvatska/language
Croatian language

http://www.degruyter.de/journals/ijsl/ijsl14701.html
Sociolinguistics in Croatia.
Magisterial works describing the current state of Croatian language. For subscribers only.

http://eleaston.com/croatian.html
Croatian Language Resources
The site contains very useful information on Croatian language, its history, many links as well as Croatian/Swedish dictionary.

http://home.pages.at/tamb/hrvatski/jezik.htm
Prijegled povijesti i ustroja hrvatskog jezika

http://www.croatianhistory.net/etf/et03.html
Croatian Glagolitic Script

http://www.croatianhistory.net/etf/et04.html
Croatian Cyrillic Script

http://www.cam.ac.uk/societies/cro/crolang.htm
The Croatian Language Today

http://www.hr/wwwhr/abouthr/language/index.en.html
Croatian language-online dictionaries and other links

http://www.ids-mannheim.de/prag/sprachvariation/fgvaria/croatian_lexical_changes.pdf
Some remarks on recent lexical changes in the Croatian language