BBC learning english is a good one i use also duolingo 

http://tutors-live.com/

https://buddyschool.com/

http://language-school-teachers.com/default.asp

https://fluentify.com/rsignup.html?user=meem.m

http://edufire.com/

https://verbling.com/

http://colingo.com/

http://palabea.com/

http://my.EnglishClub.com/

http://iTalki.com/

http://Language-School-Teachers.com/

http://www.EnglishBaby.com/

http://www.EnglishTown.com/

Here is a list for 'English as a second language' on Memrise.com

<a href="http://www.memrise.com/topic/english-second-language/wordlists/">http://www.memrise.com/topic/english-second-language/wordlists/</a>;

Use twitter and search #twinglish or #LearnEnglish or #ESL

http://www.phrasemix.com/ and http://www.italki.com/ .

Phrase mix is very useful to learn many common english phrases.

I use italki for discussions and to clear my doubts