#1
Docker

Docker

★★★★★ 4.6 Free / $5+ Free plan

Container platform for building, sharing, and running applications in isolated environments, with Docker Hub as the world's largest container registry.

containerizationdocker-hubdocker-composebuildkit
✓ Industry standard for containerization✓ Consistent development environments across teams✓ Massive ecosystem with Docker Hub registry
#2
Kong

Kong

★★★★ 4.3 Free / $0.05+ Free plan

Cloud-native API gateway and service connectivity platform offering traffic management, security, observability, and plugin extensibility for microservices architectures.

api-gatewayservice-meshload-balancingauthentication
✓ Open-source core with large plugin ecosystem✓ Sub-millisecond latency for API requests✓ Platform-agnostic deployment (cloud, on-prem, hybrid)

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