Sumatra PDF Portable

atra PDF is a portable app that does not need to be installed, and whose main function is to open all PDF files from any computer. You just need to have and run the program on an external memory. This tool is very easy to use, with a simple and intuitive interface from which you can open documents from the toolbar and they will appear directly on the screen, just like any other reader. In addition, Sumatra PDF is not only able to read PDF files, but it can also open ePub, MOBI, XPs, DjVu, CHM, and CBZ files, so you can always rely on this program when you need to carry files on a USB to open them on another computer. As it's a portable app, it's very light and fast, so you'll have no problems uploading the files, and you can use the app with any USB flash drive, even if you don't have much space.