Tiny Classroom Flash Cards is a feature rich flash card application for foreign language study. Tiny Classroom now provides free access to flash card learning lists for 30 separate languages!

+ Flash card mode
+ Written answers
+ Auto play flash cards
+ List View and filters
+ Import flash cards from web
+ Import or edit flash cards on phone

More flash card features coming soon in version 1.3

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Easy Vocabulary can be used as a vocabulary trainer or dictionary in any language.
Import or export word lists in CSV format. Find, add, edit, or delete words.
Learn vocabulary with an index card system in read, select or write mode. Have fun with Easy Vocabulary.

- German-English dictionary contains over 86,000 entries.
- English-German dictionary contains over 93,000 entries.

English-French offline dictionary

Online Dictionary - Multiple dictionaries including: English dictionary, medical dictionary, legal dictionary, financial dictionary, computer dictionary, thesaurus, dictionary of acronyms and abbreviations, dictionary of idioms, thesaurus, Columbia encyclopedia, Wikipedia encyclopedia, Hutchinson encyclopedia, examples from classic literature, pronunciations, word browser, glossary. Free access.

Application unofficial The Free Dictionary, thefreedictionary.

Kudos Wiktionary Word of the day APP and WIDGET.

Learn a new word everday by either launching the app or including a widget on your home screen (To add a widget after installing the app tap on an empty part of your background and select 'widgets' then 'Wiktionary')
Tapping the widget will give a full explanation of the word.

Dictionary data taken from wiktionary.com
Parts of the source are taken from or modified versions of that found on the Android Developer Blog.

Simple dictionary and offline Wikipedia reader.