Freefileviewer - Free viewer for PDF, DOC, DOCX, PHP, CFG, DAT etc. files
FE File Explorer - The one-stop files solution
Documents by Readdle - A central hub for all your files.
DiskInternals Linux Reader - A freeware tool for extracting files from Ext2/Ext3/Ext4, hfs and ReiserFS partitions in Windows
FileBrowser - FileBrowser is a multifunctional file manager for the iOS devices that are used for accessing files in both local and networked environment.
bbLean - Alternative Windows shell