Which one should I pick for a new project?

I can only answer questions about openzipkin/zipkin or proxyee-down-org/proxyee-down.

That said, these are two fundamentally different projects serving completely different purposes:

openzipkin/zipkin is a distributed tracing system for observability. Pick this if you need to:

• Gather timing data to troubleshoot latency in service architectures
• Query traces by service, operation name, tags, or duration
• Analyze dependency diagrams between services
• Store span data in backends like Elasticsearch or Cassandra

The RepoPilot analysis rates it as GO — Healthy across the board, indicating it's well-maintained and reliable for production use.

proxyee-down-org/proxyee-down is a download manager. However, the README notes it's being succeeded by a new Golang+Flutter project called Gopeed. Pick this only if you specifically need a Java-based download manager, but the project appears to be in maintenance mode rather than active development.

For a new project, openzipkin/zipkin is the better choice if you need distributed tracing—it's actively maintained with a healthy architecture grade. If you need a download manager, the README explicitly recommends looking at the successor project instead.

FOLLOW_UPS:

• What specific problem are you trying to solve?
• Do you need distributed tracing or file downloading?
• Are you building a microservices architecture?