English as a Second Language:

 

ESL Gold
Speaking, listening, grammar, writing, TOEFL practice, video links
http://www.eslgold.com/

Online English Course 
Complete courses for beginner to high intermediate
http://www.1-language.com/englishcourse/index.htm

English Daily
For the intermediate to advanced student
http://www.english-daily.com/

Interesting Things for ESL Students
For the beginner ESL student
http://www.manythings.org/

CNA English
This Web site is intended to help ESL learners prepare for their academic studies in becoming a Nurse Aide.
http://cnaenglish.org/

ProLiteracy
Practice English and prepare for US citizenship
https://proliteracy.csod.com/LMS/BrowseTraining/BrowseTraining.aspx?tab_page_id=-6#f=1&s=537,559&o=1&h=2