Artificial Language Lab: Language links and reference data.Bartlett's Unfamiliar Model Language: Summaries of lesser known modular languages written by Paul Bartlett. Afrihili, Eurolengo, Frater, Oz and Tutonish.Conlang Profiles at LangMaker.com: A regularly updated directory of over 1,100 invented languages and neographies.Conlang Yellow Pages by J. Shinavi: List of conlangs in alphabetical order with indication of the basis for the language.Constructed Human Languages: Categorized links to information about constructed languages.Constructed Languages: A description of constructed languages with categories and examples.Language Guides: Huge resource material for natural as well as constructed languages.Planlingvoj: Links to planned languages compiled by the Esperantist Donald J. Harlow.The ConScript Directory: A directory of invented writing systems for artificial languages.