Ethnologue – Languages of the World
A web based database by SIL International, that documents more than 7000 languages and dialects, offers a complete survey of all language families and genetic classification of the language. Also it provides statistical data and specifies the three-letter code from ISO 639-3.
WALS (World Atlas of Language Structures)
A project of the Max Planck Institute for Evolutionary Anthropology in Leipzig and the Max Planck Digital Library, which integrates the phonological, lexical and grammatical properties of 2676 languages in a database.
A searchable database of hypotheses on language relationships by the "Institute for Language Information and Technology, Ypsilanti, MI". It gives information to individual languages and graphical representatons of relationships between languages.
A database promoted by the Max Planck Society, which ofers free access to scientific information about the languages of the world. Glottolog is collaborative work of Harald Hammarström, Sebastian Nordhoff, Robert Forkel and Martin Haspelmath.
The Endangered Languages Documentation Programme (ELDP)
The mission of the ELDP is the preservation of endangered languages globally, to document and preserve endangered languages by funding scholars worldwide to conduct field work and to archive their documentary collections and make them freely available.