» Constructed Languages
An encyclopedia entry describing constructed languages, including sections on auxiliary languages, artistic languages, and logical languages.
http://en.wikipedia.org/wiki/Constructed_languages
» Earth Minimal Language
Complete 220 word second compact language.
http://ebtx.com/lang/eminfrm.htm
» Phonetic Picture-Writing
Phonetic picture-writing can also be read phonetically. Its ideograms are composed of special letters. Authored by Leonhard Heinzmann.
http://members.aol.com/leonheinz/english-lautbildschrift/lautbildschrift.htm
» Studoj pri Interlingvistiko / Studien zur Interlinguistik
Journal article by Wim Jansen that reviews a book on language planning and language policy by Sabine Fiedler and Liu Haitao. The book is on the theoretical and applicational aspects of interlinguistics, esperantology, terminology and lexicography.
http://www.benjamins.com/jbp/series/LPLP/27-3/art/0005a.pdf
» Universal Language Dictionary Project
An attempt to create a list of concepts, described in English, along with words to express those concepts in several natural and artificial languages.
http://ogden.basic-english.org/dicintro.html