Publishing a google doc as a webpage and then linking to it in Moodle. As you update the document, it is automatically updated on the Internet and therefore the updated in Moodle.
With Google Presentor can import your powerpoint files into GoogleDocs, and then by following this tutorial, you can publish these presentations into your Moodle course. The process is a little tricky, but has these benefits:You can edit the document online, and have it be updated in your Moodle course.Your students can view the presentation without having to download any plug-ins, or have Powerpoint installedMany teachers struggle with various methods to convert PowerPoint to a format that is easy for their students to view, and Google Docs is one free way to solve this problem.
Over my years of using Moodle and other LMS's, there have from time to come been requests from teachers (and students:-)) to build forms for gathering information. Building a form used to be a fairly complex task, but Google has made the process much easier by adding a form editor to their free Google Spreadsheets application.