You can use the following apps for instant information
1. Google Translate
Google's free language translation service instantly translates text and web pages. It translate words between 60 languages. You can speak your phrases and hear the corresponding translations.
Download from Android Market
Download from App Store
2. Dictionary.com
The Dictionary.com app delivers trusted reference content from Dictionary.com and Thesaurus.com. The app includes nearly 2,000,000 words, definitions, synonyms and antonyms. It also features audio pronunciation and voice-to-text search
Download from Android Market
Download from App Store
3. Wikipanion
Its designed for easy search, navigation and display of Wikipedia entries. Wikipanion provides fastest access to Wikipedia.
Download from App Store