Here is a list I have compiled of stock/microstock photography resources and articles to help you start selling your images online.

Stock/Microstock Photography Information

Microstock Diaries - Great site! Ins and outs of the stock photography market

Microstock Forums - discuss and promote your stock photography

Microstocks Curse or Blessing? - Extensive article on selling your photos through microstock agencies

Microstockgroup.com - Forum for photographers discussing the stock photo industry

Under the Branch - Informative blog on the stock photo industry

Stock photography network - an extensive resource for stock photography buyers, professional stock photographers, photographic libraries, and anyone else interested in the stock photography industry.

Selling your photos at stock sites - informative article on the ins and outs of the stock photo agencies

Increasing your image sales - informative article on featurepics.com

How to Sell Your Images

Photopreneur - make money selling your photos and marketing your photography business

Make Money Selling Digital Photos

Selling your photography online - great lens at squidoo

How to sell your photographs online

Selling photography on Ebay

Wikihow - How to sell original artwork for profit

Image Licensing Information

Royalty Free vs. Rights Managed

Licensing - easy to read chart explaining the difference between licensed, rights protected, and royalty free images

Selling Royalty Free or Rights Managed Photos

Where to Sell Your Images

Top 7 Stock Agencies

Dreamstime - Sell your stock images and get 50-68% from each sale you make. Join our powerful photo community and reach new stock photography markets

Shutterstock - ShutterStock will pay you 25 cents every time one of your images is downloaded. Their subscription model encourages buyers to download a greater volume of images than they would at other stock agencies.

Fotolia - Now with over 500k images, Fotolia is quickly becoming a great resource for stock images; photographers earn up to 80% commission on stock photos and illustrations.

Big Stock Photo - Earn $.50 to $2.00 on per photo download. Low $30 payout threshold. FTP uploads and the new extended licensing help you make the most $$ with your images!

StockXpert - Join our friendly community and start earning money with your work through Stockxpert right now! Receive 50% of each sale you make! Earn $2.00 for each XL sale!

istockphoto - Earn %20-40% commission with the worlds LARGEST micro stock community. iStockPhoto accepts medium and high resolution photos, vector illustrations, and flash files. Many advanced features to expand you earnings and track your sales.

123 Royalty Free - Earn up to 50% of subscription commissions with 123RF (not less than $.22/download). Good commission on per-photo sales as well.

Up and Coming Agencies

Crestock -  When it comes to sales, surely we don’t have the exceptional numbers as the absolute top performers, after all, we’re still fairly fresh. But – if you have a good portfolio, it is indeed possible to make several hundred dollars a month, and with the growth rate we’re experiencing, a four figure monthly income is not far away!

Feature Pics - Earn 70% commision on all photo sales. $50 payout threshold. Come be a part of our young community!

Can Stock Photos - We pay a 50% commission for guest & member purchases, and a flat $0.20 for subscription sales. Photographers are free to submit as many photos as they like, and will never be charged a cent.

Albumo - Albumo Stock Photography is a source to buy and sell royalty free stock images, search huge selection of photos, vector, clipart pictures, background graphics, illustrations, and template designs

Geckostock - Buy and sell royalty-free stock images. For people that think outside of the box!

Fotomind - Ideal for Stock Photographers and people looking to sell quality stock photos. Fotomind has a generous credit system; you can make $0.30 - $27 per download.

Mostphoto - Mostphotos.com is a international picture agency and photo forum, where photographers and customers can sell, buy and talk about images. Mostphotos.com is called the democratic stock photo site by its members since no one but yourself decides whether the picture is good enough to sell or not.