Free and Open Source, Distributed, RESTful Search Engine

Zipkin is a distributed tracing system

Picocli is a modern framework for building powerful, user-friendly, GraalVM-enabled command line apps with ease. It supports colors, autocompletion, subcommands, and more. In 1 source file so apps …

Apache Lucene open-source search software

Twitter common libraries for python and the JVM (deprecated)

A Property Graph Model Interface (no longer active - see Apache TinkerPop)

A Japanese Tokenizer for Business

RedPen is an open source proofreading tool to check if your technical documents meet the writing standard. RedPen supports various markup text formats (Markdown, Textile, AsciiDoc, Re:VIEW, reStruc…

open source thread dump analysis tool

A high performance "thin wrapper" HTTP REST server on top of Apache Lucene

Demo project showing how to add elasticsearch to a legacy application.

Demo examples for Lucene, Solr, ElasticSearch and OpenNLP from Berlin Buzzwords 2013 talk