Metrics: Event Logging & Aggregation & Exception Tracking & Stats Servers (Ruby) on pluginGeek

Sentry is a realtime error logging and aggregation platformhttps://getsentry.com

FnordMetric is a redis/ruby-based realtime Event-Tracking apphttps://github.com/paulasmuth/fnordmetric

An alternate JavaScript and Ruby front-end and graph storage application for the Graphite Real-time graphing engine. https://github.com/paperlesspost/graphiti

A ruby statsd server implementation storing to Redis and diskhttps://github.com/noahhl/batsd

The simplest way to group temporal datahttp://ankane.github.io/groupdate/

Real-time visualization of server traffic, events and statistics with Ruby, SSH and OpenGLhttp://www.fudgie.org

Giraffe - a graphite dashboard with a long neckhttp://giraffe.kenhub.com/

The friendly gem that instruments everything for you, like I would if I could.https://github.com/jnunemaker/nunes

Von is an opinionated Redis stats trackerhttps://github.com/blahed/von

A redis backed metric tracking tool: duly noted.http://willcosgrove.github.com/duly_noted/