Documents by Readdle - A central hub for all your files.
GoodReader - With GoodReader on your iPhone, iPod Touch or iPad, you can read virtually anything, anywhere.
FE File Explorer - The one-stop files solution
FileApp - FileApp is an iPhone and iPad File System and Document Viewer.
Total Reader - Application for reading books. Multi-format support.
Universal Viewer - Universal Viewer is an advanced file viewer for wide range of formats. Supported file formats are: