The Portable edition for LibreOffice, a productivity suite that is compatible with other major office suites, be able to run from a USB flash drive or any other portable device.
LibreOffice was developed to be a productivity suite that is compatible with other major office suites, and available on a variety of platforms. It is free program and therefore free to download, use and distribute.

LibreOffice Portable is the complete LibreOffice office suite -- word processor, spreadsheet, presentations, drawing, etc. -- packaged with a PortableApps.com Launcher as a portable app, so you can work with all your documents on an iPod, USB flash drive, portable hard drive or any other portable media. It has all the same outstanding features of LibreOffice including support for multiple file formats (Microsoft Word, Word Perfect, Microsoft Excel, etc), PDF export, realtime spell checking and more... all in a familiar interface. Plus, it leaves no personal information behind on the machine you run it on, so you can take your whole office suite wherever you go.

The license of this software is Free, you can free download and free use this office suite software.