If you don't have installed program for editing PDF documents on your computer, then you can use web application PDFescape which allows you to edit your documents in your browser.
Google Forms is a useful tool to help you plan events, send a survey, give students a quiz, or collect other information in an easy, streamlined way. In this lesson we will show you how to create a simple questionnaire and send it through e-mail.
Cool thing about Google Drive is you can access all your documents from anywhere and you can actually upload a Microsoft PowerPoint presentation which automatically turns into Google Drive Slide.
A real useful web service for all the designer who want to know what colors have been used on a certain image. You can even download a Photoshop Swatch file containing the color palette of the image.