An appli a day is good for you!
Go to Google Web Store using Google Chrome, and search for Wikipedia. It just creates a link to the website, but it's nice to have it on your apps list. That is not what I want to share but Wikibooks. Since it's holiday, you may want to read books and learn something new today! I learned Blender 3D from Wikibooks in those days (Although, I still buy from Amazon).You can download it in PDF for your PC. Here's the link: http://en.wikibooks.org/wiki/Subject:Books_by_subject