Chosen as "Best Dictionary App" by the book "Best Android Apps: The Guide for Discriminating Downloaders", O'Reilly Media.

Free Dictionary is an English Dictionary that gives you English definitions, synonyms, pronunciation and spelling.
- Auto-suggestion
- Offline Database query when there is no network
- Wikipedia Integration
- Play quiz game
- Searched word on Google Images
- Search history

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.

Langtolang Free English French And French English Dictionary with online lookup. It has auto-suggestion feature.

DictionaryForMIDs is a multi-purpose, offline dictionary application. Many dictionaries are available for automatic (may take a while) or manual installation, you can even create your own dictionary using tools from the website.

WordMate is an universal dictionary application.

http://wordmate.net

Langtolang Free English Turkish And Turkish English Dictionary with online lookup. It has auto-suggestion feature.

Langtolang Free English Spanish And Spanish English Dictionary with online lookup. It has auto-suggestion feature.

Langtolang is a multilingual dictionary.

Langtolang Free English Italian and Italian English Dictionary with online lookup. It has auto-suggestion feature.

English-French offline dictionary

Convenient app to use the multitran.ru online dictionary.

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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Langtolang Free English German And German English Dictionary with online lookup. It has auto-suggestion feature.

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.

Simple dictionary and offline Wikipedia reader.

Langtolang Free English Chinese And Chinese English Dictionary with online lookup. It has auto-suggestion feature.

The Application is developed to easily learn foreign words. Flash-cards and matching. All dictionaries are downloadable. English-French, English-Spanish, English-Russian, English-Italian. Other language pairs coming soon.

Langtolang Free English Japanese And Japanese English Dictionary with online lookup. It has auto-suggestion feature.

Eng-Thai-Eng talking dictionary for HTC Magic/Hero

Dictionnaire Littré