www.dreamstime.com

Dreamstime pays anywhere from 50% to 80% commission for photos you sell, which is one of the highest among microstock sites. The commission increases as you sell more of your photos on the site. They also allow you to sell exclusively to a single buyer at a higher price. Dreamstime has an additional program called the "keymasters". It provides keywords for photos on the site, which are used when customers search for photos. As a keymaster, you are paid 0.20 Dollars for each photo you provide keywords for.

BigStockPhoto

BigStockPhoto sells most photos on their site for $1-$2, and you receive 50% of this as your commission. They also offer a "Special Licensing" feature which allows you to choose from a number of different licensing options. The customer is given more flexibility in how they can use your photo, and you are paid much more than for a standard photo. In order to apply, BigStockPhoto provides a short tutorial on what kind of photos they can accept, and then you must answer a few questions based on the tutorial.

123 Royalty Free

123 Royalty Free pays a 50% commission for each photo you sell on their site. Standard photos sell for $1-$3 depending on size and your photos are not exclusive to 123 Royalty Free, so you may sell them anywhere else you choose. To apply you must provide a form of ID, and send in a number of sample images. 123 Royalty Free accepts only very large images of at least 4 megapixels, so make sure that your camera is capable of this.