i-FunBox - General file management software for iPhone and other Apple products
iCopyBot iPod to Computer Transfer - iPod to Computer Transfer - Get music off iPod and transfer to PC or Mac Computer, Copy songs, video, photos, playlists back to iTunes.
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)
SynciOS Manager - Syncios is a free yet powerful cellphone to PC transfer software which can help to transfer App, Music, Photo, Video and Ebook from PC to iPod/iPhone/iPad as well as Android Phone, Android to PC, iPhone PC and iPad to PC.
WALTR - Drag-and-drop any media file to an iOS device (without iTunes) for native playback.
Vysor - Vysor lets you view and control your Android on your computer.