Longman English Dictionary - Firefox Addon Longman English Dictionary - Longman English Dictionary is the leading dictionary for learners of English of all ages and levels who want to learn more about English: definitions, idioms, examples and more
PolySpell - Firefox Addon PolySpell is the most advanced spelling correction system available on the market today.
PolySpell incorporates an open-ended and highest quality English Language Spell Checker, a Medical Spell Checker, a Scientific Spell Checker and a Web SpellChecker
Spanish (Spain) Dictionary - Firefox Addon Spanish (Spain) Dictionary - Firefox Addon - Spanish spell check dictionary for Firefox.
XPI repackaging of Spanish spelling dictionary, es-ES variant, from RLA-ES project, which was started and maintained by Santiago Bosio, mainly aimed to OpenOffice.org
South African English Spell Checker - Firefox Addon South African English Spell Checker - This South African English spell checking dictionary allows you to use place names, borrowed words and expressions that are uniquely South African.
No more eina, just a lekker spell checker
Yiddish spell checker (YIVO) - Firefox Addon Yiddish spell checker - Spellchecking dictionary for Yiddish language. Contains entries in standard YIVO orthography and is compatible with the previously developed specification, which assumes not using typographic ligatures in the simple text because of their special functions
Valencian Catalan Dictionary - Firefox Addon Valencian Catalan Dictionary - Firefox Addon - This dictionary adds to the general version some characteristic Valencian forms, such as two accentuation possibilities of some words. For instance, anglès (general) i anglés (Valencian)