All of the resources described in this LibGuide are free to the public or at least to members of the YSU community.
Some of them have optional subscription modes that provide you with additional features for a monthly fee, but these are not required.
Freemium is a business model by which a product or service (typically a digital offering such as software, media, games or web services) is provided free of charge, but a premium is charged for advanced features, functionality, or virtual goods.
The word "freemium" is a portmanteau combining the two aspects of the business model: "free" and "premium".
Click the "more..." link for more information about these services.