Kobiton
Mobile app testing on real devices in the cloud or on premises
Genymotion
Android emulator in the cloud and on the desktop
Postman
API platform for testing, mocking and monitoring APIs
Insomnia
Open source API client for HTTP, gRPC, GraphQL and WebSockets
Bruno
Local-first API client storing collections as plain-text files
Hoppscotch
Open source API development ecosystem: web, desktop and CLI