OpenTracing and OpenCensus are merging into OpenTelemetry

Timeline to Convergence
The migration for each language involves building a production-ready SDK, instrumentation for popular libraries, documentation, CI, a backwards compatibility bridge, and closing down the associated OpenCensus and OpenTracing projects (“sunsetting”). Goal: First draft of Cross-Language Specification (due May 8th)
It is important that the project remain cohesive, even as we work in parallel on separate languages. Goal: Sunset OpenTracing and OpenCensus (due Nov 6th)
By September 6th, if the new project has reached parity, the existing projects will begin to be shut down.

Source: medium.com