Re-process logs from applications you cannot modify to convert them to json and add prometheus/stats metrics
Export Prometheus metrics from arbitrary unstructured log data.
Syslog Collector written in Go, streams to Kafka 0.8
A high-performant Logging Foundation for Go Applications. X3 faster than the rest leveled loggers.
Swiss knife for logs
Exporter for machine metrics
xlog is a logger for net/context aware HTTP applications
Structured, composable logging for Go
A minimalistic 12 factor log router written in Go
Logging package similar to log4j for the Go programming language
Go port of Coda Hale's Metrics library