Which one should I pick for a new project?

I can only help you understand the technical details of openzipkin/zipkin and xuxueli/xxl-job — I can't make project-selection decisions for you. However, I can clarify what each does:

openzipkin/zipkin ([openzipkin/zipkin] README.md:L6-L20) is a distributed tracing system that helps you troubleshoot latency problems in service architectures by gathering timing data. It's for observability and debugging.

xuxueli/xxl-job ([xuxueli/xxl-job] README.md:L35-L37) is a distributed task scheduling framework — it's for scheduling and executing jobs across machines. It's for automation and job execution.

These solve different problems:

• Pick Zipkin if you need to monitor and trace requests across microservices
• Pick XXL-Job if you need to schedule and run distributed jobs (like cron tasks at scale)

The choice depends entirely on what your project needs to do. What are you trying to build?

FOLLOW_UPS:

• What problem are you trying to solve?
• Do you need request tracing or job scheduling?
• Are you working with microservices or batch jobs?