POSXTO.COM
Esperanto-Posxto

ESPERANTO VARIANTS:
Perilo - improved, simplified Esperanto.

ESPERANTO RESOURCES - Free Esperanto courses:
www.kurso.com.br - multilingual esperanto course
Fun Esperanto introduction - esperanto.ca/kurso   not really a course, but a fun introduction to the language
Esperanto Viva - mintex.demon.co.uk/espviva/angla/   - lessons about the language and culture (free tutor)
Kurso de Esperanto - cursodeesperanto.com.br/en/index.html   - computer program with sound files (Windows)
User friendly on-line courses:   www.lernu.net

ESPERANTO RESOURCES - Cool stuff:
Pasporta Servo (free international housing) home.planet.nl/~lide/ps_lingv/ps_en.htm
Esperanto chatroom  karelia.komputilo.org
English-Esperanto dictionary  wwwtios.cs.utwente.nl/traduk
Esperanto-Esperanto dictionary   purl.org/NET/voko/revo
Esperanto encyclopedia   eo.wikipedia.com

Some great places to learn more about Esperanto in English:
The Esperanto Book by Don Harlow - webcom.com/~donh/eaccess/eaccess.book.html
Esperanto: A Language for the Global Village by Sylvan Zaft - members.aol.com/sylvanz/gvcont.htm  
About Language Problems by Claude Piron - geocities.com/c_piron
Free Software Is About Freedom, Not Software (Open Source and Esperanto)
opensourceschools.org/article.php?story=2002031006145521
webpage  amuzulo.babil.komputilo.org

Esperanto Multilanguage Center - A great source for Esperanto that is written in 42 languages.
Universal Esperanto - Another good source for Esperanto, available in 7 languages.
Esperanto Literature - a fine collection of original, online literature written in Esperanto.
Esperanto Hypercourse - An online introduction to Esperanto.
Esperanto Suite 101 - features many articles, stories, lessons, and more written in and about Esperanto
English/Esperanto Dictionary
Free Esperanto Course - A ten lesson course with a basic vocab intro; is graded by Esperantists for free.
Esperantic Studies Foundation - researches the accuracy and spread of Esperanto; has some interesting articles about it's implementation.
An Esperanto Overview -A FAQ on Esperanto, it's origins, and the use of it; a great page for those interested in learning it.
Esperanto Online Web Ring - if it's in or about Esperanto, it can be placed on this web ring.
Esperanto Access - a site filled with Esperanto courses, services, publishers, music and more.
The Esperanto League of North America - a national non-profit educational association of Esperantists and supporters of Esperanto in the United States who have a common interest in using and promoting Esperanto as an answer to the world language problem.
Google Esperanto Directory - a web site directory written in Esperanto with sites written in it as well.
Pasporta Servo - Pasporta Servo is a hospitality network, currently consisting of some 1075 hosts in more than 75 countries around the globe. Stay with a host in a foreign country, usually for free, all because you know Esperanto and are interested in other cultures!

MORE ESPERANTO RESOURCES:
Esperanto: Multlingva Inform-Centro - http://www.esperanto.net/
Multilingual Information Center about Esperanto: Information in many languages about Esperanto
Esperanto Access - http://www.webcom.com/~donh/esperanto.html
Access to information in and about Esperanto on the World Wide Web
Reta Vortaro - http://www.uni-leipzig.de/esperanto/voko/revo/
Collaborative multilingual Esperanto dictionary.
Prague Manifesto - http://www.esperanto.se/dok/praguemanifesto.html
Declaration of widely shared principles of the Esperanto movement, July 1996.
Learn Not To Speak Esperanto - http://www.xibalba.demon.co.uk/jbr/ranto/
A somewhat humorous argument against Esperanto by Justin B. Rye.
Esperanto - http://www.wikipedia.org/wiki/Esperanto
Description of Esperanto with answers to arguments against its use as an international language.
Suite101.com: Esperanto - http://www.suite101.com/welcome.cfm/esperanto
Newsletter discussing history and developments in Esperanto.
Esperantujo - http://steve-and-pattie.com/esperantujo/
Brief description of the language and a short Esperanto-to-English dictionary of essential words.
Esperanto Panorama - http://esperanto-panorama.net/angla/
Well-designed and comprehensive directory of websites in Esperanto and in English about Esperanto
A Key to the International Language Esperanto - http://www.esperanto-chicago.org/key.htm
Concise overview of core grammar and lexicon.
Negative Aspects of Esperanto - http://www.xibalba.demon.co.uk/jbr/ranto.html
Linguistic critique by Justin B. Rye
Esperanto Viva! - http://esperanto.org/espviva/angla/
A free correspondance, featuring 10 lessons to introduce one to Esperanto.
Pasporta Servo - http://home.wxs.nl/~lide/ps_lingv/ps_en.htm
International hospitality service for young people speaking Esperanto.
An Esperanto Weblog - http://radio.weblogs.com/0100712/
Random observations about the international language.
Esperanto Course - http://anaproy.homeip.net/esperantocourse/
This course offers a guide to Esperanto.
Esperanto Grammar - http://ling.osu.edu/~hana/esr/grammar/
Written in English with emphasis on morphology.
A Brief History - http://www.geocities.com/Athens/Delphi/9061/eo2.html
History of the International Language Esperanto. Boulogne Declaration, basic grammar, lexicon and texts.
Esperanto Koresponda Servo - http://members.aol.com/Enrike/ekseo.htm
Esperanto Penpal Service
Esperanto Phrases - http://esperantophrases.tripod.com
Some phrases in Esperanto
Psychological Reactions to Esperanto - http://esperantic.org/ced/psyres.htm
Classic essay by Belgian/Swiss psychologist Claude Piron.
An X' Analysis of Esperanto - http://www.twics.com/~koma2/offprints/LH164/
Transformational analysis of Esperanto by Masahiko Komatsu.