Launched in 2017, the eCampusOntario Open Library curates more than 500 open-access educational resources for post-secondary educators and learners. A range of subjects are represented in the library, including: "computing and IT," "language and linguistics," "mathematics and science," and "philosophy and religion." In addition to browsing the resource collection, readers will find several other unique OER tools on the site. For example, though the cost-saving benefits of open educational resources have been widely recognized, Open Library makes these benefits tangible through its impact calculator. Found on the Impact page, this tool allows educators to input some basic data (such as the cost of the resource they are replacing and the number of students they are teaching that term) to quickly calculate the total savings. Notably, the "average savings per educator," is more than $50,000, and the "average savings per learner," is more than $100. Educators new to OER may also want to explore the Get Support page, which hosts several helpful materials. Educators willing to share materials they created can do so via the "Make a Suggestion" box on the About page. The library is made possible by a collaboration between eCampusOntario and Ryerson University. Readers can also view the site in French.