BBC

1.  In this site you can find short videos, any grammatical videos, which will help you in your English.

2.  The site is very comfortable in use, you can search what you need.

3. You can download the audio

4. After the video there are tasks and you can check how did you understand the lessons.

5.  There are answers after test.

6. There are tasks for different English level

7.  I think that the most interesting and usefull part in this site are videos.

Voice of America

1.  The general thing in this site it's American English. And here you can 

find a lot of topics, videos, audios and many others.2. This site comfortable for use.There are searching.3. You can download the audio4.  There are videos with subtitles, but without tasks5. There are videos, but without tasks.6. There are tasks for different levels. You can choose your level and watch video,and listen audio.7.  So if like American English, this site will help me to learn it

Skillwise

1. On this site you can find some groups  of information. It's home, reading,writing,spelling and some others.2.  The site is very comfortable to use because the information was shared on groups.3.  You can download the task after video.4. There are tasks after each video, topic, text.5.  There are keys for each tasks and we can download them.6. There are tasks for different levels speakers. And when you watched video you can choose your level.7.  As for me, it is very helpfull resource. There are interesting games, which help you in training English.