Apps, Extensions and Webpages
Google Scholar- a simple way to broadly search for scholarly literature. From one place, you can search across many disciplines and sources: articles, theses, books, abstracts and court opinions, from academic publishers, professional societies, online repositories, universities and other web sites.
Draftback: play back the revision history of any Google Doc you can edit. It's like going back in time to look over your own shoulder as you write.
CheckMark: an extension that makes giving feedback more efficient. It is an overlay that enables frequently used comments to be inserted quickly.