The statistical software language R is open-source with free download for Windows PCs. It's a bit cumbersome to learn with the help manuals running to 4,000 pages of "stream of consciousness" thinking. However, it's very powerful, and will readily do things that (say) Excel cannot do. Scripts can be saved to Word documents for later re-use.
Or classroom. Digital Flipbooks like "Flipsnack" are an interesting way to create online content that connects learners with innovation. Through virtually flipping pages you can add .pdf's, url's, meme's, gifs, and other digital content to be stored in one virtual textbook. This would be great for manuals, textbooks, or any type of file sharing.