My online library # 2: General Use

General use, research and study through vocabulary content, examples, games, curiosities

http://www.answers.com
It works as a dictionary with translations to various languages and explanations of some words, including unanswered questions, new questions, new answers and reference library with several categories

http://www.usingenglish.com/ 
Resources for English as a Second Language, UsingEnglish.com provides a large collection of English as a Second Language (ESL) tools & resources for students, teachers, learners and academics. It includes Grammar,  Idioms , Phrasal verbs and much more information

http://idioms.thefreedictionary.com/ 
The world's most comprehensive dictionary: English, Spanish, German, French, Italian, Chinese, Portuguese, Dutch, Norwegian, Greek, Arabic, Polish, Turkish, Russian, Medical, Legal, and Financial Dictionaries, Thesaurus, Acronyms and Abbreviations, Idioms, Encyclopedia, a Literature Reference Library, and a Search Engine all in one!

http://www.englishclub.com/ 
Free website for learners and teachers of English (lessons, games, quizzes, forums, chat, lesson plans and more for ESL learners & teachers). Example:
http://www.englishclub.com/ref/Phrasal_Verbs/index.htm

http://www.amadeumarques.com/
It is a blog of a very experienced English teacher with tips in: Good question!

http://www.funeasyenglish.com/ 
Very interesting sessions. Check the video with idioms!

http://public.wsu.edu/~brians/errors/index.html 
Curiosities based on natives’ English usage

http://www.manythings.org/lulu/ 
English Vocabulary Games with Pictures

http://www.eslgold.com/  
ESL: English study and learning materials- Students and Teachers

http://elt.oup.com/learning_resources/?cc=br&selLanguage=en 
Learning Resources Bank – Oxford University
Use these extra practice activities and interactive exercises when you adopt our materials. (Teachers)

http://elt.oup.com/student/englishfile/;jsessionid=9B26EBA27898191BD1D53B120EAE8A45?cc=br&selLanguage=en  
New English File online- Oxford University
Learn more English here with interactive exercises, useful downloads, games, and weblinks. Practise your grammar, vocabulary, pronunciation, listening, and reading, and have some fun too. (Students)

http://ead1.unicamp.br/readweb/englishtrails/ 
Linguistics Studies Project provided for Unicamp to help students and English teachers to find free resources in the learning-teaching process

http://www.vocabulary.co.il/ 
It is a very interesting site which uses games to help improving vocabulary, idioms, synonyms, etc