Free and Open Source, Distributed, RESTful Search Engine

Netty project - an event-driven asynchronous network application framework

OpenRefine is a free, open source power tool for working with messy data and improving it

Interview questions

OplaPlanner has moved to https://github.com/apache/incubator-kie-drools. This repository is archived. OptaPlanner is an AI constraint solver in Java to optimize the vehicle routing problem, employe…

an open source geocoder for openstreetmap data

317 efficient solutions to HackerRank problems

An easy-to-use BI server built for SQL lovers. Power data analysis in SQL and gain faster business insights.

Official GeoTools repository

Retail banking sample application showcasing Kubernetes and Google Cloud

Immutable in-memory R-tree and R*-tree implementations in Java with reactive api

Implementation of GeoHashes in java. We try to be/stay compliant to the spec, as far as possible.

Neo4j Spatial is a library of utilities for Neo4j that faciliates the enabling of spatial operations on data. In particular you can add spatial indexes to already located data, and perform spatial …

Official deegree repository providing geospatial core libraries, data access and advanced OGC web service implementations

Small useful things for Java

Quadtree implementation

Testing library for JUnit4 and Guice.

Processing Logs at Scale using Cloud Dataflow

A Java client library for SimpleGeo's API. Documentation located at https://ci.public.simplegeo.com/job/java-simplegeo/javadoc/