Cydia - An alternative app store for jailbroken devices.
Semrush App Center - Power your marketing by connecting your apps to Semrush data
AppRecs - AppRecs sorts through reviews in the App Store and automatically helps you filter out inauthentic results.
Shopify App Store - The most powerful ecommerce app store
Fnd - Browse Apple App Store and iTunes on the Web
Outbound Apps by Intercom - Embed apps right inside your messages