PDF Candy is a collection of absolutely free online and offline tools for working with PDF files (converting, splitting, merging, rotating, etc ). You can use this tool on the web or download the app for your Windows computer.
All tools are very easy to use. You can always upload files from Dropbox, Google Drive or simply by drag and dropping them. Each tool can be added to 'Favorites' for faster access from the index page of the PDF Candy website. It looks like almost everything you can do with Adobe Acrobat you can do with PDF Candy, but you don't have to pay for a new program.