Chinese

Both

• 國學大師 (被404了) or 國學迷
• 漢典 (ZDIC)
• 臺灣教育部詞典 (Taiwan Ministry of Education dictionaries)

Modern

• MDBG
• Online Chinese Collocation Assistant (北京师范大学中文搭配助手)
• BCC语料库
• 有道词典
• 金山词霸 (iCIBA)
• CNKI翻译助手
• Chinese Grammar Wiki (中文语法维基)
• Basic Rules of Hanyu Pinyin Orthography/中文拼音正词法基本规则
• CNKI Reference Works (CNKI工具书馆; CrossAsia license)
• Apabi 工具书 (CrossAsia license)
• 北大法宝 (CrossAsia License)/PKULaw (CrossAsia License)
• 國家教育研究院: 雙語詞彙、學術名詞暨辭書資訊網
• 中華語文知識庫 (Chinese Linguipedia)
• Babelcarp Chinese Tea Lexicon

Classical

• Thesaurus Linguae Sericae (TLS, 漢學文典)
• Notes on Literary Chinese
• Chinese Text Project (中國哲學書電子化計劃)
• 漢達文庫 (CHANT Chinese Ancient Texts Database; CrossAsia License)
• 韻典網
• DILA: Glossaries for Buddhist Studies/佛學術語字辭典
• 搜韻
• 小學堂
• 顧國林: 古音小鏡
  • 漢文字詞典 (漢語大詞典、漢語大字典、故訓匯纂、古音匯纂、王力古漢語字典、古漢語常用字字典、字源、ABC上古漢語詞源詞典、古字通假會典等)
• Paul W. Kroll: A Student’s Dictionary of Classical and Medieval Chinese (CrossAsia License)

Sinology

• Brill Asian Studies E-Books Online (CrossAsia License)
  • Brill’s Encyclopedia of China (CrossAsia License)
• Classical Historiography for Chinese History (中國經典文獻工具書錄), especially the “Sinological Toolkit”
• 兩千年中西曆轉換 (Sinocal)
• Kuribayashi Hitoshi 栗林均: 「モンゴル諸語と満洲文語の資料検索システム」 (Online Dictionary and Full-Text Search of Mongolian Languages and Written Manchu)
• 中華經典古籍庫 (Zhonghua Ancient Books Database; CrossAsia License)

Tools

• Learning the other Chinese
• 開放中文轉換 Open Chinese Convert (OpenCC)
• Chinese to Pinyin Converter
• Conversion table for romanizations of Chinese
• 漢字情報研究センター・データベース (Documentation and Information Center for Chinese Studies (DICCS))
  • 東洋学文献類目検索 (Bibliography of Oriental Studies on the Web)
  • 東方學デジタル圖書館 (Oriental Studies Digital Library)
• 日中（簡・繁）漢字変換 (Chinese/Japanese character form converter)
• 漢字変換道具 (Kyūjitai/Shinjitai converter)
• 漢籍善本全文影像資料庫
• 東京大学史料編纂所・データベース選択/Historiographical Institute of The University of Tokyo Database List

Japanese

Modern

• DJT Japanese
• 辞書 (jisho)
• Weblio国語辞典
• goo辞書
• コトバンク (Kotobank)
• 国語辞書 – エキサイト 翻訳 (Excite dictionary)
• Jim Breen’s WWWJDIC: Text Glossing
• Tae Kim’s Japanese Grammar Guide
• A Dictionary of Japanese Grammar
• Convert kana to romaji

Old/Middle

• Weblio古語辞典
• Imabi 今日 Classical Japanese

Art

Calligraphy

• 書法大師
• 史的文字データベース連携検索システム (Multi-database Search System for Historical Chinese Characters)
• ROIS-DS人文学オープンデータ共同利用センター (ROIS-DS Center for Open Data in the Humanities)
  • 日本古典籍くずし字データセット検索 (Pre-Modern Japanese Text Kuzushiji Dataset Search)
  • AIくずし字OCRサービス (Kuzushiji OCR Service)

Ukiyo-e

• 変体仮名を調べる (Variant kana)
• 極印と改印 – 時代区分 (Censor seals)
• Viewing Japanese Prints: Inscriptions and Seals on Ukiyo-e Woodblock Prints
• Katō Yoshio 加藤好夫: 「浮世絵文献資料館」 (Ukiyo-e Reference Materials Library)
  • 版元一覧 (Publishers Overview)
• 落款・印鑑検索サイト (Inkan Search)
• ARC浮世絵ポータルデータベース (ARC Ukiyo-e Portal Database)

Social Science Research

• Kieran J. Healy: The Plain Person’s Guide to Plain Text Social Science (PDF)
• William M. K. Trochim: Research Methods Knowledge Base
• China Vitae (中国名人录)

English

• Oxford English Dictionary
• Oxford Reference English Dictionaries
  • Oxford Dictionary of English (3 ed.)
  • New Oxford American Dictionary (3 ed.)
  • Oxford Paperback Thesaurus (4 ed.)
  • Pocket Oxford American Thesaurus (2 ed.)
• Oxford Reference Bilingual Dictionaries
  • Pocket Oxford German Dictionary: English–German (4 ed.)
  • Pocket Oxford German Dictionary: German–English (4 ed.)
• Oxford Collocations Dictionary (mirror)
• Merriam-Webster Dictionary and Thesaurus
• Collins Dictionary and Thesaurus
• Longman Dictionary of Contemporary English
• WordNet Dictionary
• ProWritingAid Collocations Dictionary
• LanguageTool Style and Grammar Check
• Online hyphenation tool
• The Purdue University Online Writing Lab (OWL)
• Harvard Journal of Asiatic Studies Style Sheet (PDF)
• The Chicago Manual of Style Online, especially the “Chicago-Style Citation Quick Guide”

Cantonese

• CantoDict
• CC-Canto by Pleco
• 粵典 (words.hk)
• 粵拼/Jyutping

Arabic/Farsi

• Erik Taal: Arabic Language Resources (Hans Wehr, Lane’s Lexicon, J. G. Hava, المورد, لغات القرآن, Grammar)
• Ali Jahanshiri علی جهانشیری: Persian Language Tools (Verb Conjugator, Grammar)

Miscellanea

• 免费中文字体 (Free Chinese Fonts)
• Noto Sans CJK/Noto Serif CJK, also known as Source Han Sans/Source Han Serif

Firefox add-ons

• uBlock Origin
• Perapera Chinese Popup Dictionary
• 10ten Japanese Reader (Rikaichamp)
• Bypass Paywalls Clean
• Readability based Reader View

R

• Hadley Wickham and Garrett Grolemund: R for Data Science
• Hadley Wickham: Advanced R
• Hadley Wickham and Jennifer Bryan: R Packages
• Jennifer Bryan and Jim Hester: What They Forgot to Teach You About R
• Colin Gillespie and Robin Lovelace: Efficient R Programming
• Julia Silge and David Robinson: Text Mining with R: A Tidy Approach
• Kieran J. Healy: Data Visualization: A Practical Introduction
• Robin Lovelace, Jakub Nowosad, and Jannes Münchow: Geocomputation with R
• Edzer Pebesma and Roger Bivand: Spatial Data Science
• Chester Ismay and Albert Y. Kim: Statistical Inference via Data Science: A ModernDive Into R and the Tidyverse

Packages

• Tidyverse
• 杨学辉: rstatscn fixed version
• Xu Mingchu: mapchina
• Chris Muir: geolocChina
• 中文常用停用词 (Chinese stop words)

Maps

• 中国历史地图
• 太史古卷
• 标准地图
• 国家地理信息公共服务平台・天地图