Google Docs and PowerPoint allow you to acquire the images by copying them from the original sources and then pasting them inside of the documents you create when you use the programs.

Using Google Docs, you can create word processing documents, spreadsheets and presentations. The presentations application uses a "slide" system that is very much similar to Microsoft's PowerPoint ...

You can insert Google Slides into Google Docs by copying a particular slide to Google Docs. This guide shows you how to do that.

You can create Microsoft Office and Google Docs files directly from Dropbox; create, edit, and save documents all without having to switch to another app. Here's how.