Trove, a product of the National Library of Australia. This massive site is a combination of many things: a metadata aggregator, a portal for all things Australian, and a home to large digital collections, particularly of Australian newspapers. The site is free to use, but it also allows users to create a profile; logged-in users can manage their findings and contribute to the site in various ways. Trove's organizers have produced a number of videos to help new users construct searches and to understand the organization of the collections. Whenever possible, Trove provides information about the physical location and method of access for non-digitized items returned in searches.
Readers who wish to keep up with new items in Trove can subscribe to the project's blog.