I have been working with various content writing websites and here are my favorite work at home opportunities (if you like writing articles for cash). Here I will list just three best sites for earning money by writing, but if you want to find more sites, where users write articles for cash, please check out this link.
Squidoo.com - my favorite get paid to write website. I have been using it for a long time and think that it has the highest earning potential. In order to make money online by writing with Squidoo you have to register, start creating information pages, promote them and receive money from your pages.
Squidoo.com supports various advertising options (Adsense, Infolinks, Chitika, Ebay, ect) and pays 50% of advertising revenue. Minimum cashout is just 1 dollar via PayPal.
HubPages.com - similar website, which works on revenue sharing basis. After registration you will be able to create your information pages, get dofollow backlinks from these pages and earn money from Google Adsense revenue sharing basis. Users receive 60% of money earned from ads on your hubs.
InfoBarrel.com - one of the newest get paid to write website but certainly one of the best. Make money by publishing your articles. All content pieces are to pass moderation process, you have a chance to add links to your articles but your articles shouldn't be over promotional. Google Adsense revenue sharing is set at 75%.
I do hope you will like these websites. Good luck in earning cash from home by writing content (articles, reviews, tutorials, how-to guides, ect).
