What is a Plug-in?
A plugin is an extra cost add-on component to our software that provides additional functionality, not delivered with the application itself. It is an option for those who require that extra feature or level of customisation to enhance the service they can provide to their users or admin staff. A plug in may be authored by a technology partner or service provider.
Some plug-ins, like SoutronSDS are developed by Soutron for a specific need that are not generally required in a library service.