Open Source Search Software

CLucene is a C++ port of Lucene: the high-performance, full-featured text search engine written in Java. CLucene is faster than lucene as it is written in C++.

OpenSearchServer is a powerful, enterprise-class, search engine program. Using the web user interface, the crawlers (web, file, database, etc.) and the client libraries (REST/API , Ruby, Rails, Node.js, PHP, Perl) you will be able to integrate quickly and easily advanced full-text search capabilities in your application: Full-text with basic semantic, join queries, boolean queries, facet and filter, document (PDF, Office, etc.) indexation, web scrapping,etc. OpenSearchServer runs on Windows and Linux/Unix/BSD.

Sgrep (sorted grep) is a much faster alternative to traditional Unix grep when searching large files, because sgrep searches sorted input files using a fast binary search to find matching lines.

Integra desktop search engine - cross-platform, portable, embeddable, extensible search engine and search tools (both console and GUI) for developers and end-users. Full unicode support, easy UI localisation, plugins for document parsers and unpackers.

esearch is an extensible firefox-like searchbar seemless integrated within eclipse.

Aperture is a Java framework for extracting and querying full-text content and metadata from various information systems (file systems, web sites, mail boxes, ...) and the file formats (documents, images, ...) occurring in these systems.

Document summarization system. By adding document content to system, user queries will generate a summary document containing the available information to the system.

Gumshoe Desktop Search indexes local files of various formats on a Windows desktop and provides a search GUI. The project is developed in Java. It builds on other opensource projects including Lucene, Luke, SWT, tagsoup, Jakarta POI and others.

Infofuze is a Java library and server application that can be used to transform and combine data from various sources into a specific XML or other text output format that can be stored or indexed.

Jake is a console based app written in python and qt4. Plugins will let you do almost anything, for example, search in google, translate, view images, talk with it (aka AI bot). Also, skining system will let you choose how should jake look.

The Java API search engine will allow users to search for Java classes that may be useful in the development of their current project

Lucino is a C-library with some support for reading and writing Apache Lucene-indices. It currently comes with PHP- and Python bindings.

Nucular Archiving System for creating full text indices for fielded data. Python API, web, and command line interfaces. Fast. Very light weight. Concurrent read/writes with no possible locking issues. No server process. Proximity. Facets. Funny name.

OpenEphyra is an open framework for question answering (QA). It retrieves answers to natural language questions from the Web and other sources. Visit http://www.ephyra.info/ for more details and information on joining this open research initiative.

RegExpresso is a "regular expressions" tester, designed to integrate well into modern web browsers. Though it has few features compared to commercial products, it should be usefull to any programmer who uses regular expressions.

SCAN (Smart Content Aggregation and Navigation) is a universal semantic content aggregator. It combines search, text analysis, tagging and metadata functions to provide new user experience of desktop navigation and document management.

a Solr Based Semantic Mediawiki Store

Search Help is a very helpful and easy-to-use program. You can search for web pages, photos, lyrics or you can translate words from german to english and otherwise. Search Help uses some of the well-known search engines to get results.

Narrows search result produced by popular Internet search engines, allowing to put extra filtering conditions, as certain words presented, certain words excluded, and so on.

Like Unix-Tail BUT: - Runs with or without GUI - Suspend and resume tailing at runtime - Can monitor a set of Files - Print output to a textfield, stdout or file - Runs in "Grep" mode, too (Read files once) - (Almost) the same options as Unix-Tail

Set of various network observing and searching services (FTP indexer, SMB indexer, gameserver pinger and history logger, web interface for search and management) mainly for LAN-Parties. Technologies: C#, ASP.NET, IIS, MSSQL, Access, TCPIP

XSpace is a globally accessible repository for hierarchically-keyed information. It provides persistence for trees with an elegant tree-navigation API. XSpace also publishes real-time events whenever a persisted tree is updated.

Xapian is a Search Engine Library, written in C++ with bindings for Perl, Python, PHP, Java, Tcl, C# and Ruby. Xapian allows you to easily add advanced indexing and search facilities to your applications. See www.xapian.org for more information.

Clucened is a project to build a daemon around CLucene, which is a C++ implementation of the Lucene search engine. This is *not* the CLucene project, but is a separate project to write a generic daemon based on CLucene.

A configurable knowledge management framework. It works out of the box, but it's meant mainly as a framework to build complex information retrieval and analysis systems. The 3 major components: Crawler, Analyzer and Indexer can also be used separately.