i-FunBox is recommended for tech-savvy users who are comfortable working with third-party applications and need more robust file and app management options for their iOS devices. It's ideal for users who want to easily transfer files, perform app backups, or manage apps outside the limitations of iTunes.
Documents by Readdle - A central hub for all your files.
iMazing - iMazing lets you transfer music, files, messages, apps and more from any iPhone, iPad, or iPod to a computer, Mac or PC. Manage and backup your iOS device simply without iTunes. (was DiskAid)
Documents Pro 7 - The ultimate all-in-one mobile office suite for the iPhone and iPad with 8 premium apps in 1.
CopyTrans - CopyTrans is a tool for managing the files on your iPhone or iPad through your computer's interface.
FileBrowser - FileBrowser is a multifunctional file manager for the iOS devices that are used for accessing files in both local and networked environment.
iExplorer - iExplorer lets you easily transfer music, playlists, text messages, files and more from any iPhone, iPod, or iPad to a Mac or Windows computer and iTunes.