We have been asked about licensing models by some customers. Here are some clarifications.

For end-user products:

Single user license: the license is applicable when only one user will use it.
Site license: the license is applicable when the product will be used by a group of people in a company.
 

For development components:

Single developer license: the license is applicable when only 1 developer will use the component or the component can be deployed on one server as service. 
Development team license: the license is applicable when a development team will use the component or the component can be deployed on five servers as service
Enterprise license: the license is applicable for using the component by an enterprise on unlimited servers as service or applications
Source license: the license is applicable for using the source code of the components in unlimited servers as service or applications

If you are developing a desktop application (not web service), all of the above licenses allows you to redistribute the component freely with your application.