Now a days Facebook is not just a teen hangout place. It has become a business community where business started networking with other business & their customers. More & more business are now opening their Facebook profile pages.
To support these business need, their is a huge need for custom Facebook apps that can help business to perform their task quickly and effectively.
If you are a software vendor or a hobbyist then you may want to explore Facebook apps. You will find that building a small Facebook apps is very easy.
Microsoft has also developed a Facebook Developers kits and quick start guide that will give you a jump start. Below are some reference links to get started.
Also check our previous Article Facebook Developer Toolkit 2.0 – Open Source
If you know more reference links then please share them using the comment section.