iOSStash - A huge collection of app-related tools
Liftoff.io - eCommerce & web to print platform
Lightwell - App creation platform for creatives.
Localytics - App analytics and marketing for iPhone, iPad, Android, HTML5, Blackberry and Windows apps.
iOS Cookies - A hand curated collection of iOS libraries written in Swift
AppNext - AppNext offers mobile monetization and app distribution solutions.