Apple Business Essentials - Apple Business Essentials is an all-new service that brings together device management, 24/7 Apple Support, and iCloud storage into flexible subscription plans for small businesses with up to 500 employees.
TestFlight - iOS beta testing on the fly.
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)
TestApp.io - A platform that helps both mobile app developers and owners to easily share their apps with everyone to get feedback before reaching publicly to Google and App stores.
Deviceplane - Device management for embedded systems and edge computing
AppHost - Free iOS and Android (IPA and APK) app hosting for enterprise and internal mobile apps.