Sourcera

Sourcera is an add-on that lets you search in many of the world's largest and richest archives (including Europeana) for images that are free to reuse. With a single click, you can insert an image with caption, attribution and link to source into a Google document or slide. Take also a look at the original web version of the project, Culture Collage.

Download Sourcera for free from the Chrome Webstore - you can use it for Google documents and slides!