Wikipedia: App store | Digital distribution platform 

See also: Application Programming Interfaces (APIs) | API Management | API Stores

Data focused API stores: Infochimps (@infochimps) | Kasabi (@Kasabi)

---

MyRobots .. Robot App Store (@_myrobots)

Strong Steam .. The AppStore for Artificial Intelligence and Data Mining Tools (@strongsteamapi)

Mashape .. API Marketplace for Cloud based Services (@mashape)