ODF Viewer - AndroidODF is a tool for viewing text documents, presentations and spreadsheets in ODF format for...
Documents by Readdle - A central hub for all your files.
OpenDocument Reader - OpenOffice Document Reader is an Android OpenOffice and LibreOffice Document Reader!
FE File Explorer - The one-stop files solution
LibreOffice Viewer - The Document Foundation provides a LibreOffice Viewer for Android.
FileApp - FileApp is an iPhone and iPad File System and Document Viewer.