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)

EasyEmail - Gmail plug-in that helps you write emails quickly

i-FunBox - General file management software for iPhone and other Apple products

Text Case - Format any raw text on iOS and more 📝

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.

Really Good Emails - A large collection of good product email design.