Zipkin is a distributed tracing system

QuestDB is an open source time-series database for fast ingest and SQL queries

JetBrains theme of Material Theme

📈 Capturing JVM- and application-level metrics. So you know what's going on.

configuration library for JVM languages using HOCON files

Twitter's collection of LZO and Protocol Buffer-related Hadoop, Pig, Hive, and HBase code.

A distributed system designed to ingest and process time series data

Karoo companion app for Japanese electronic shifting groupsets. Display gear/battery information and control Karoo ride screen.

Grendel is a RESTful web service which allows for the secure storage of users' documents.

A minimal syndication server built using Dropwizard