Adobe Acrobat DC - Make your job easier with Adobe Acrobat DC, the trusted PDF creator. Use Acrobat to convert, edit and sign PDF files at your desk or on the go.
Filza File Manager - Explore files and folders with list view or grid view. View / edit files with powerful viewers.
Sumatra PDF - Sumatra PDF is a slim PDF/DjVu/EPUB/XPS/CHM/CBR/CBZ/MOBI viewer for Windows.
Documents by Readdle - A central hub for all your files.
Wondershare PDFelement - All-in-one PDF editor
FileApp - FileApp is an iPhone and iPad File System and Document Viewer.