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)
ifttt - IFTTT puts the internet to work for you. Create simple connections between the products you use every day.
Documents by Readdle - A central hub for all your files.
Zapier - Connect the apps you use everyday to automate your work and be more productive. 1000+ apps and easy integrations - get started in minutes.
FileApp - FileApp is an iPhone and iPad File System and Document Viewer.
n8n.io - Free and open fair-code licensed node based Workflow Automation Tool. Easily automate tasks across different services.