Lingua Franca Nova:

Lingua Franca Nova homepage
Lingua Franca Nova Wiki
Lingua Franca Nova Yahoo group
Lingua Franca Nova tutorial

Linguistics:

Introduction to the Study of Languages
Introducción al Estudio del Lenguaje
Basic Language Structures
Estructuras Básicas de las Lenguas
Phonetics
Fonética
Morphology
Morfología
Componential Analysis
Semantics
The Evolution of Language
Cambio y Evolución en el Lenguaje
The Origins of Language
Los Orígenes del Lenguaje
Language Development in Children
Desarrollo del Lenguaje en Niños
The Evolution of English
The Dialects of English
Language Families of the World (maps)
The Indo-European Family of Languages (maps, charts)
The Evolution of the Indo-European Language (maps, charts, and timetable)
The Origin of the Alphabet
The Evolution of Alphabets
English Simplified Spelling
The Mars Alphabet
The Neutral Language
The Neutral Language Vocabulary