Pauper Scholar — Get it in Chrome Web Store
Pauper Scholar is a Chrome extension for the Google Scholar website which adds an ability to differentiate between free-access and paid-access articles, in particular, it can hide all paid-access articles in search results.
An article is considered to be a free-access one if there's a link to a paper next to it.
See the LICENSE file for license rights and limitations (MIT).
The Pauper Scholar icon is a derivative work of the school icon from the Material icons collection.
