English Tonight
It’s an incredible flexing website where you can practice anytime you like, even in the middle of the night.
It offers you resources to practice and enhance your English vocabulary, grammar, listening, speaking and writing. And also you can find some tips to improve your English.
Exam English
This website is for people studying for an English language exam. This page contains free online practice tests for the most important international ESL exams. Specially, you’ll practice vocabulary, grammar and listening.
Learning English
This website is for people with lower-intermediate to upper-intermediate level of English. Here you’ll find a wide range of topics divided into units, sessions and activities. The English learners can improve their reading, vocabulary and grammar skills.
http://www.bbc.co.uk/learningenglish/english/course/lower-intermediate/unit-1/
Online Learning Center
This website will help you to practice your listening skills; also you can practice your vocabulary skills with some activities. This page will be useful for all the levels.
http://highered.mheducation.com/sites/0073328626/student_view0/index.html
Learning English
You can improve your listening and vocabulary skills. This website has a lot of videos and recordings to practice your skills. If you don’t understand all that the people are saying, you can read the script. This page is for an intermediate level.
http://www.bbc.co.uk/learningenglish/english/features/6-minute-english
English & Science Site 