Ethnologue: An encyclopedic reference work cataloging all of the world’s 6,912 known living languages

The Universals Archive of Universität Konstanz. : A huge list of linguistic universals that have been suggested in the relevant literature, in particular those of an implicational kind.

SIL

Endangered languages:The SIL webpage on endangered languages.

Software tools: Computer resources including an extensive library for language researchers and software tools and fonts.