Here are the popular sites where you can submit your articles
Buzzle.com
thefreelibrary.com
ideamarketers.com
Ezinearticles.com
abcarticledirectory
Amazines.com
articletrader.com
ArticlesBase.com
GoArticles.com
The websites that are popular need modifications from time to time .Recent example is of getafreelancer site that is very popular and is looking pretty good after the redesign