Cassandra

Zipkinopenzipkin/zipkin

A distributed tracing system that collects and queries timing data to troubleshoot latency problems in microservices.

ConductorNetflix/conductor

A microservices orchestration engine created by Netflix to manage workflows across distributed services.

Cadence (.2k)uber/cadence

A distributed, scalable, and highly available orchestration engine for executing asynchronous long-running business logic.

kairosdbkairosdb/kairosdb

A fast distributed scalable time series database built on top of Cassandra.

Open Dotaodota/core

Open source Dota 2 data platform providing automated replay parsing and a public API for match analytics.