Just Announced - "Learn Spring Security OAuth": 

tutorials

The official home of the Presto distributed SQL query engine for big data

presto

Apache Druid: a high performance real-time analytics database.

ClickHouse is a free analytics DBMS for big data

Apache Spark - A unified analytics engine for large-scale data processing

:tropical_fish: Beats - Lightweight shippers for Elasticsearch & Logstash 

Open Source, Distributed, RESTful Search Engine

GraalVM: Run Programs Faster Anywhere :rocket:

APM, Application Performance Monitoring System

cloc counts blank lines, comment lines, and physical lines of source code in many programming languages.