Google Dataset Search is a search engine from Google that helps researchers locate online data that is freely available for use. The company launched the service on September 5, 2018, and stated that the product was targeted at scientists and data journalists.
The site contains 25 million publicly available datasets1 (including data tables, images, video, audio, and more), even though many of them are information pages about existing datasets that can't be directly accessed electronically. For instance, Plans of Sydney Opera House only displays archive information and not the actual dataset—This series is held at Western Sydney Records Centre—but many others, like the architectural drawings and photographs of a Kipahulu real estate house in Maui, Hawaii, can be downloaded (in this case as a PDF).
This is promising.