Constructed Human Languages
   Comprehensive guide to various invented and artificial languages. Includes links to numerous invented language projects on the web.
   http://www.quetzal.com/conlang.html

Earth Minimal language
   Are you feeling terse today? It may be hard to get any more precise than in an "Earth Minimal Language" expression. Check out this incredible language from EBTX.
   http://www.ebtx.com

Model Languages
   Free open source LangMaker software for Windows to help design consistent languages for all kinds of settings. Build a vocabulary from scratch or extrapolate from real examples.
   http://www.langmaker.com/

The Language Construction Kit
   Intended for anyone who wants to create artificial languages -- for a fantasy or an alien world, as a hobby, as an interlanguage. It presents linguistically sound methods for creating naturalistic languages -- which can be reversed to create non-naturali
   http://www.zompist.com/kit.html