This is mavenised Luke: Lucene Toolbox Project

ELKI Data Mining Toolkit

Open-source Enterprise Grade Search Engine Software

Scalable Time Series Data Analytics

Disk-based B+-tree written in Pure Java

Java autocomplete library.

Spatial index library with R*Tree, STR-Tree, Quadtree, CritBit, KD-Tree, CoverTree and PH-Tree

Simple full text indexing and searching library for Java

此工具利用「百度-必应-谷歌」站长工具或开放平台接口即时推送网站更新给搜索引擎，加快蜘蛛程序爬取与更新。

Your personalized retrieval engine

ST-Hadoop is an open-source MapReduce extension of Hadoop designed specially to analyze your spatio-temporal data efficiently

Parallel boolean circuit evaluation

Java implementation of Rapid Automatic Keyword Extraction Algorithm

A simple search engine for documents

Trie-Based Prefix Index for Java

Search Engine for Books (Java, Apache Lucene, crawler4j, Apache Spark)

project in Java that simulates the behaviour of a Database Engine. We applied the concepts of database query optimization and indexing

借助 Indexing API，任何网站所有者都可在添加或移除网页时直接告知 Google。这样一来，Google 就能及时整理网页并安排新的抓取，从而带来更优质的用户流量。目前，Indexing API 只能用于抓取包含 JobPosting 或 BroadcastEvent（嵌套于 VideoObject）的网页。

A tool for calculating the Burrows-Wheeler transform (BWT) in a Map-Reduce fashion on Apache Spark Framework.