Conlang Profiles at LangMaker.com: maintained by Jeffrey Henning; a huge directory of conlangs, natural language resources, Babel texts... This is the ultimate conlang site! This was the ultimate conlang site.
Auxilingua Project is an archive of information on auxlang projects and authors through the centuries.
ZBB : A great forum for Conlanging and Linguistics.
Conlang X-Sampa: tables and online converter for Conlang X-Sampa (ASCII IPA)
Unilang is a general language website where people can discuss, and find resources related to language(s), linguistics and translations.
World Auxiliary Language Campaign: A budding global campaign, language and language-type neutral, to promote the idea of and consensus for a world auxiliary language being chosen by a binding global and representative convocation to decide the issue