Best Websites to learn Arabic Online

Yalla Arabic Blog

http://yallaarabic.blogspot.com/

Alf Sakhr 

http://afl.sakhr.com/

Fun With Arabic 
http://www.funwitharabic.com/alphabet.html

Learn and Speak Arabic 
http://arabic.speak7.com/

Search the truth 
http://www.searchtruth.com/arabic/lessons/unit1_writing.php