1- Docs Quickly
Create a Google Doc, Spreadsheet, Presentation, or Drawing directly from your Chrome bar. No need to launch docs.google.com; just a single click, and you have a new document.
2- Save as PDF
This extension lets you easily save web pages to pdf. It uses https://pdfcrowd.com html to pdf online service.
Use the Evernote extension to save things you see on the web into your Evernote account.
4- Write Space
Write Space is a customizable full-screen text-editor that lives in your web-browser. It is designed to minimize the distractions that come between you and your writing.
5- Easy Bib Tools
Automatically cite web sites with one click using the EasyBib Toolbar. Receive advice on the credibility of the web site you’re citing. Cite as many sources as you need to build a fully-formatted, alphabetized, and Word-processor-ready bibliography.
Todo.ly is an intuitive and easy to use online Todo list, and Task Manager. It helps you to get organized, and to get things done.
7- Watch Doc
If you have shared some documents with others on Google Docs, before you had to go check whether anyone’s modified them. This Chrome extension will list your shared documents that were updated since the last time you have viewed them.
Easily share and save your attachments. Connects to Dropbox, Google Drive, SkyDrive, and Box.
Allows you to upload a pdf version of the current page to your Google Drive using the pdfcrowd service.
10- Stay Focused
StayFocusd increases your productivity by limiting the amount of time that you can spend on time-wasting websites
11- Time Tracker
The extension attempts to detect user activity (by mouse movements) and will pause the timer if the user is not at the keyboard.
12- Quick note
Quick Note is especially designed for lightweight note-taking. You can use it as a simple notepad, scratchpad, clipboard, or to record todo lists.
13- Grammarly lite
Grammarly Lite is a free spelling and grammar checker to help you write without mistakes on Gmail, Facebook, Twitter, Tumblr, Linkedin, and anywhere else on the Web. Grammarly® Lite integrates contextual spelling and grammar check, thesaurus, and dictionary into your Web applications.
Any.DO helps you remember everything you have to do. Some of the things you can do with this extension include:
15- Panic Button
PanicButton makes it easier for you to hide all of your tabs at once just by clicking on a button. They are then saved as bookmarks in a separate folder. Afterwards, the PanicButton turns green and shows you how many tabs are currently hidden.