FE File Explorer - The one-stop files solution
Documents by Readdle - A central hub for all your files.
qAllInOne - qAllInOne (aka qAIO) is a free open-source software that provides users an All-In-One media player, so it can view images, play videos and audio.
FileApp - FileApp is an iPhone and iPad File System and Document Viewer.
FileBrowser - FileBrowser is a multifunctional file manager for the iOS devices that are used for accessing files in both local and networked environment.
GoodReader - With GoodReader on your iPhone, iPod Touch or iPad, you can read virtually anything, anywhere.