Some nice translation tools...

• Eijiro on the Web (ALC)
• Jim Breen's WWWJDIC Dictionary Server
• POPjisyo.com
• Reading Tutor
• Rikai
• rikaichan
• Babel Fish Translation
• Denshi Jisho
• Hiragana no Megane
• http://spencer.blackmarket.net Dictionary
• Japanese Kanji Dictionary (with Sound)
• JEDict
• Jeffrey's Japanese⇔English Dictionary Server
• jeKai Japanese-English dictionary project
• Lycos Online Electronic Dictionary
• Online-Dictionary.biz
• The Super Dictionary
• Ultra Handy Japanese Verb Conjugator

Summary Notes from Courses I Have Taken

• Nichibei Kaiwa Gakuin - B2S Notes
• Yookoso - Book 1
• Yookoso - Book 2
• Getting Down to Business: Japanese for Business People
• An Integrated Approach to Intermediate Japanese, Ch. 1-8
• An Integrated Approach to Intermediate Japanese, Ch. 9-15
• ビジネスのための日本語
• Causative, Passive, Passive-Causative and Natural Potential Verb Forms

Special Study Tools

• Grammar Quiz

Random Kanji, Yookoso Kanji, & Vocabulary From Courses I Have Taken

• Cool Random Kanji Study Tool!
  
  
• Business Japanese Class Vocabulary
• Review Kanji for Yookoso Book 1
• Review Kanji for Yookoso Book 2
• Review Kanji for All Classes
  
  
• The Joyo Kanji - A Complete Table

These links should help in your studies

Blogs

• 3Yen
• Bicycle-sidewalk.
• Japancast.net
• Japanese for Life
• Japanese! Japanese!
• JAPANITE
• Kanji My Blog
• Learn-Amazing-Japanese: Learning Japanese through Real World examples
• Mayumi K's Osaka dialect 大阪弁 Japanese Podcast
• Naruhodo!
• Nihongojouzu
• 日本語 a go-go
• 男らしい: For the questions that bug ya

Connecting

• Japanese Language Meetup
• Japanese Penpals
• JapaneseLearning.com Friends
• Kanjistep.com Mail Friend
• MyLanguageExchange.com
• Sharese.com
• The MIXXER
• World Friend Network - Japan

General

• Brian Rak's Learn Japanese Page
• Charles Kelly's Online Japanese Language Study Materials
• David Hallgren's Nihongo Website
• ECIS Internet Broadcast (インタネート放送局)
• eLanguageSchool.net
• Genki Self-Study Pages
• Have Your Japanese Corrected by Native Speakers' Journal
• HSC Online - Japanese Course Materials
• Japanese! Japanese!
• japanese-kanji.org
• Japanese-Online.com
• JapaneseLearning.com
• JOSHU
• JP Net - Japanese Language and Culture Network
• Lessons in Japanese on WagaWiki
• Livejournal correctjapanese
• MIT OpenCourseWare
• MLC Meguro Language Center - Free Material
• Nihongo Resouces
• Phrasebase
• sci.lang.japan FAQ
• The Japanese Language
• Web Japanese
• York University Japanese Studies Program Materials

Grammar

• A Japanese guide to Japanese grammar
• A Logical Japanese Grammar
• About.com Japanese Grammar/Expressions Lessons
• Bible Japanese Page - Weekly Grammar Example
• CMJ Grammar Online
• Conversation Openers and Fillers
• E-Kanji
• Fast Track - 100 Grammar & Useful Phrase Bits
• Have Your Japanese Corrected by Native Speakers' Journal
• Japanese for the Western Brain
• jGram - Japanese Grammar Database
• Jim's Japanese Grammar Summary
• JLPT Grammar Guide
• Livejournal correctjapanese
• Nagoya University CMJ Grammar Online!
• Nihongo Notes
• Nihongo Resouces
• Particles (About.com)
• Sentence Ending Particles
• The "Passive"
• The Causative/Permissive
• The Extended Use of the Verb "Suru"
• The Quick and Dirty Guide to Japanese
• Tim's Takamatsu: Language
• Ultra Handy Japanese Verb Conjugator
• Wikibooks Japanese
• Wikipedia Japanese grammar
• 日本語阜ｻ文型辞典

JLPT Exam

• JLPT Kanji Project
• Drill the Kanji - JLPT Kanji Review Tool
• e-Japanese
• Japanese Kanji Flash
• Japanese Language Proficiency Test First and Second Grade Study Guide
• Japanese Language Proficiency Test Resources
• JEES Guide to the Japanese language proficiency test (in Japan)
• JLPT - Level 2 Vocabulary Quizzes
• JLPT - Level 3 Vocabulary Quizzes
• JLPT - Level 4 Vocabulary Quizzes
• JLPT Communication Square
• JLPT Grammar Guide
• JLPT Level 4 Vocabulary Quiz
• JLPT Vocabulary Lists
• kanji-a-day
• MLC Meguro Language Center - Free Material
• speedanki.com
• The JLPT Level 4 Study Page

Kanji

• JLPT Kanji Project
• A Door to the World of Kanji
• About.com Kanji Land
• All About Radicals
• Asian Language Terminology
• Benjamin Barrett's Japanese Lesson Pages
• David Hallgren's Nihongo Website
• deciphering japanese: how to teach and learn kanji
• Drill the Kanji - JLPT Kanji Review Tool
• E-Kanji
• Excel@Japanese
• Hans Wadsten's Nippon Portal
• Henshall Kanji Mnemonics
• J2E Flashcard Program
• japanese-kanji.org
• Java Kanji Flashcards 500
• Joyo 96
• Kanji (Wikipedia Encyclopedia Entry)
• Kanji by Frequency
• Kanji Clinic
• Kanji Dictionary Publishing Society
• Kanji FAQ
• Kanji Names Project
• Kanji Networks Etymological Dictionary
• Kanji Practice
• Kanji Radical List
• Kanji Radical List
• Kanji Writing Exercise Sheets
• kanji-a-day
• Kanji.kiev.ua
• KanjiGymLight
• kanjiPod
• Kanjiroushi kanji a day RSS feeds
• Kanjistep.com
• Kiki's Kanji Dictionary
• KingKanji
• Look Up Kanji by Radical
• Mainichi-Kanji
• More About Kanji
• Nihongo Ganbatte!!
• OCha No Kanji
• Outline of Japanese Writing System
• Radical positions and Japanese names
• Radicals
• Read the Kanji
• renshuu.org
• Samurai Kanji
• speedanki.com
• The 214 radicals and their English names
• The Kanji SITE
• The Top Two Thousand Kanji
• 主な部首名と漢字

Mobile Phone

• Japanese Kanji Flash

Online Lessons

• hesjapanese.com
• Japanese Ads - Learning Japanese Through Print Ads
• Japanese Online Institute (JOI)
• Japanese-Online.com
• Kanjistep.com
• Learn-Amazing-Japanese: Learning Japanese through Real World examples
• Live from Tokyo
• NHK World Japanese Lessons
• Nihongo Everyday
• Tanabata

Other

• Bible Japanese Page
• Expressions Used in Letters
• Japan Newbie
• Kansai Ben
• LearnJapanese (Sabotage Internet)
• Linguistic Theory and the Japanese Language
• Reading Japanese Signs
• Reiko-chan's Japanese for Anime-Lovers
• TangoTown
• Teach Yourself Japanese
• Total Quality Japanese
• WWOOF Japan - Work Your Way Around Japan

Reading Material

• Aozora (青空文庫)
• Canadian Association for Japanese Language Education 日本語ものがたり
• Digital E-hon Site (デジタル絵本)
• DoCoMo Digital Library - 日本のむかしばなし
• E-Kanji
• Harry Potter and reading for vocabulary
• Hitokuchi Douwa (ひとくち童話 )
• Japanese Ads - Learning Japanese Through Print Ads
• Japanese as a Second Language Pleasure reading (娯楽のための読書)
• Japanese Classical Literature at Bedtime Podcast
• Japanese Text Initiative
• Japanorama
• Ken Ijikevich Ujie's Reading Materials
• Logos Children's Library
• Nihongo Everyday
• Nippon VoiceBlog
• Old Stories of Japan (日本昔ばなし)
• WEB絵本胡桃の森 (Web picture book walnut forest)
• Why Japanese reading comprehension matters
• Yomihoudai
• Yomiuri Shinbun letters page (発言小町）
• チュウ太の読解教材バンク (Reading Comprehension Teaching Materials Bank)
• 福娘童話集 (fukumusumedouwashuu)
• 阜ｻよみ作品集 (Hyogen Yomi Sakuhinshuu)
• 電子文藝館小説
• 題名未定キャスト (Daimei Mitei Cast)
• ＢＯＴさんのおはなし

Schools

• Association for the Promotion of Japanese Language Education
• Cornell FALCON Program
• e-Japanese
• Japanese Language Institute (JLI), IEC
• Japanese Online Institute (JOI)
• Language Course Finder
• MIT-Japan Program
• Study in Japan Comprehensive Guide

Software / Tools

• jeKai Japanese-English dictionary project
• JFC (Japanese Flash Card) Program
• JWPce
• Kanji My Blog
• Kanji Trainer Penpen
• KanjiGymLight
• kanjiPod
• KingKanji
• Learnit Lists
• Moji Firefox Extension
• Nintendo DS Lite
• rikaichan
• Samurai Kanji
• The Super Dictionary
• WaKan

Translate

• Babel Fish Translation
• Denshi Jisho
• Eijiro on the Web (ALC)
• Hiragana no Megane
• http://spencer.blackmarket.net Dictionary
• Japanese Kanji Dictionary (with Sound)
• JEDict
• Jeffrey's Japanese⇔English Dictionary Server
• jeKai Japanese-English dictionary project
• Jim Breen's WWWJDIC Dictionary Server
• Lycos Online Electronic Dictionary
• Online-Dictionary.biz
• POPjisyo.com
• Reading Tutor
• Rikai
• rikaichan
• The Super Dictionary
• Ultra Handy Japanese Verb Conjugator

Video / Audio

• Bicycle-sidewalk.
• ECIS Internet Broadcast (インタネート放送局)
• George and Keiko
• HSC Online - Japanese Course Materials
• Irasshai Video Lesson Website
• Japancast.net
• Japanese Classical Literature at Bedtime Podcast
• Japanese TV on Youtube
• Kanda (神田) Podsayings Podcast
• Learn Japanese Podcast
• Mayumi K's Osaka dialect 大阪弁 Japanese Podcast
• mp3japan
• NHK World Japanese Lessons
• Nihongo Juku - A resource for students of Japanese
• Nihongo o Manabou (にほんごをまなぼう)
• nihongo.fm
• Nippon VoiceBlog
• TalkSushi Learn Japanese Podcast
• wwwiTV (World Wide Internet TV)
• York University Japanese Studies Program Materials
• あまね☆ごえ (amanegoe)
• ちまたの日本語 - "Real World" Japanese
• 怜祈の日常ですよ？(Reiki no Nichijou Desu Yo)
• 読売ニュースポッドキャスト (Yomiuri News Podcast)
• 阜ｻよみ作品集 (Hyogen Yomi Sakuhinshuu)
• 題名未定キャスト (Daimei Mitei Cast)

Vocabulary / Phrases

• 261 Commonly-Used Japanese Adjectives
• Common Japanese Terms in Anime
• Counters
• English-Japanese Vocabulary Quizzes
• Excel@Japanese
• healthhokkaido Symptom Translator
• J2E Flashcard Program
• Japanese Onomatopoeia in Action
• Japanese Swadesh List
• JLPT - Level 2 Vocabulary Quizzes
• JLPT - Level 3 Vocabulary Quizzes
• JLPT - Level 4 Vocabulary Quizzes
• JLPT Level 4 Vocabulary Quiz
• JLPT Vocabulary Lists
• Kanda (神田) Podsayings Podcast
• Language Express Kana Game
• Learnit Lists
• Life Science Dictionary Project
• minna no benkyou
• Nathan Mrvichin's Nihongo stoof (Yookoso! vocabulary)
• Nihongo o Manabou (にほんごをまなぼう)
• nihongo.fm
• Onomatopoeic Expressions
• Relationships with Animals: Cats
• renshuu.org
• Simple Japanese Phrases
• Talking on the Phone
• Yoji-Jukugo
• 気ままに日本語　(Kimama ni, Nihongo)
• 語彙数推定テスト (Vocabulary Assessment Test)
• 関西弁 (kansai dialect)

All work and no play make Yoshi a dull boy...

• alt.japanese.text
• bit.listserv.japan
• comp.research.japan
• fj.life.in-japan
• fj.rec.travel.japan
• k12.lang.japanese
• sci.lang.japan
• soc.culture.japan

Useful site from those who teach

• MIT Japanese Language Program Materials
• Naoko Suito (UT Austin Professor)

Recommended books for studying Japanese

• All About Particles: A Handbook of Japanese Function Words
• Basic Connections: Making Your Japanese Flow
• Making Sense of Japanese: What the Textbooks Don't Tell You
• 13 Secrets for Speaking Fluent Japanese
• 2001 kanji: Structure analysis, association method, fully cross referenced, fast visual index
• A Guide to Remembering Japanese Characters
• A Guide to Remembering Japanese Characters: REVIEW
• Breaking into Japanese Literature
• Common Japanese Phrases (決まり文句の辞典)
• Complete Master Series-The Japanese Language Proficiency Test
• Gateway to Japan (Kodansha Guide)
• How to Sound Intelligent in Japanese: A Vocabulary Builder
• Instant Business Japanese: Real Life Skills for Real Life Situations
• Japanese Sentence Patterns for Effective Communication
• Japanese Textbook Discussion Board: List of Books
• Kotoba Tsukaikata Ejiten (ことばつかいかた絵じてん)
• Memoirs of a Geisha: A Novel
• O-Hayo Sensei's Online Japan Bookstore
• Pictures from the water trade: An Englishman in Japan
• Pimsleur Comprehensive Japanese
• Read Real Japanese: All You Need to Enjoy Eight Contemporary Writers
• Remembering the Kanji I
• Sing Japanese: The Fun Approach to Studying Japanese
• The Complete Japanese Expression Guide

Here are some sites about Japan or Japanese for those who speak something other than English

• YUKO-FORUM Japanisch-Forum (a German board about Japanese language learning)

Hitomi Hirayama's Pera Pera Penguin

Some Japanese Language Related Twitter Accounts

• learnkanji (Learn Japanese - 日本語)