"Using Paperpile add-on enables you to easily insert citations with a single click. You can conduct a search for a journal article while working on your document, insert the citation and get the reference cited for you. Paperpile is also ideal for collaborative co-authoring and can even work with dozens of co-authors. About the privacy issue here is what Paperpile has to say about it:"
Here are four excellent Chrome apps specifically curated for Math teachers and students. These apps are ideal for writing, editing and viewing math formula whether they are simple or complex. One of these tools, TeX equation editor, is integrated with Google Drive so you can easily paste TeX equations right into your Google Docs.
Google Docs Quick Create is a Chrome extension that allows you to quickly create Google documents, spreadsheets, presentations, forms, and drawings with one click. Instead of going to your Drive, clicking on "new" and selecting a service you want to use ( which is quite a process), Google Doc Quick Create provides you with a simple and time-saving shortcut. Here is how it works: