Apache is a free and open-source cross-platform web server software.
Bluehost is a large web host known for its WordPress expertise, variety of “one-stop-shop” services, and bargain prices.
DoubleClick Ad Exchange is a real-time marketplace to buy and sell display advertising space.
Google AdSense is a program run by Google through which website publishers serve advertisements that are targeted to the site content and audience.
PayPal is an online payments system that supports online money transfers and serves as an electronic alternative to traditional paper methods like checks and money orders.