Dict.info Czech Dictionaries - A collection of free Czech bilingual dictionaries for Croatian, Danish, Dutch, English, Esperanto, Finnish, French, German, Italian, Japanese, Japanese Romaji, Latin, Norwegian Bokmal, Polish, Russian, Slovak, Spanish, Swedish, Turkish, Ukrainian, and Yucatec. Browsable online, with word searches, and downloadable data files.
Dict.info Czech-English Dictionary - Bilingual Czech-English dictionary with over 130,000 terms. Browsable online, with word searches, and downloadable data files.
Slovnik.cz Multilingual Czech Dictionary - Online dictionary with bilingual translations in Czech to and from English, French, German, Italian, Russian, Spanish and Latin.
Wordbook's Multilingual Czech Dictionary - Dictionary with bilingual translation for Czech into and from English, German, French, and Spanish. With clickable special character input.
LingvoSoft Czech-English Online Dictionary - Bilingual Czech-English dictionary; site also includes a multilingual dictionary with 25 languages.
Ectaco Online Czech-English Dictionary - Czech-English bilingual dictionary; site also includes 21 other languages.
Bohemica Czech-English Dictionary - HTML bilingual dictionary for Czech-English.
Valency Lexicon of Czech Verbs - Downloadable Czech lexicon of verbs, meant primarily for scholars and researchers.