ODF Viewer - AndroidODF is a tool for viewing text documents, presentations and spreadsheets in ODF format for...
Okular - Okular is a universal document viewer based developed by KDE.
LibreOffice Viewer - The Document Foundation provides a LibreOffice Viewer for Android.
Sumatra PDF - Sumatra PDF is a slim PDF/DjVu/EPUB/XPS/CHM/CBR/CBZ/MOBI viewer for Windows.
Foxit Reader - Foxit Reader is a free and light-weight multi-platform PDF document viewer.
Atril - Atril is a simple multi-page document viewer. Atril is a fork of Evince.