LibreOffice Viewer - The Document Foundation provides a LibreOffice Viewer for Android.
OpenDocument Reader - OpenOffice Document Reader is an Android OpenOffice and LibreOffice Document Reader!
Cisdem DocumentReader - Need to read mutiple windows documents on Mac? Cisdem Document Reader is the all in one solution to read WPD, WPS, XPS, OXPS, VISIO, DjVu, PDF, Winmail.dat files on Mac. Try it now!
Office Documents Viewer - Document viewing application for Open Document Format (OpenOffice, LibreOffice) and OOXML...
Office Online - With Office Online you can view, edit, and share Word, Excel, PowerPoint, and OneNote files on your devices using a web browser, so you can work anywhere.
Sumatra PDF - Sumatra PDF is a slim PDF/DjVu/EPUB/XPS/CHM/CBR/CBZ/MOBI viewer for Windows.