On e-rara.ch, Swiss libraries make digitized rare books from the 15th to 19th century available, free of charge. The present focus is on 16th century Swiss prints. The range available is extended by several thematic collections as well as maps dating from the 16th to the 19th century.
Detailed information about the project is available on the page About e-rara.ch.
The page All collections shows the present status of digitization. Currently, there are
19423 titles available online. You can subscribe to the list of newly added titles as a RSS feed.