Electron App Store - There are many app stores available for many platforms.
Intercom App Store - Integrate with Intercom and grow your business
Zoom Apps - Build Apps on Zoom
Hotline - In-app chat,real-time engagement & self-service for your app
Shopify App Store - The most powerful ecommerce app store
Intercom - Intercom is a customer relationship management and messaging tool for web businesses. Build relationships with users to create loyal customers.