TestFlight - iOS beta testing on the fly.
AppTec 360 - AppTec 360 offers enterprise mobility management solution.
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.
AirWatch by VMware - AirWatch is an enterprise-grade mobile device management, mobile application management and mobile content management solutions.
AppHost - Free iOS and Android (IPA and APK) app hosting for enterprise and internal mobile apps.
LogMeIn AppGuru - AppGuru offers a cloud-based app-management system for the BYOD era.