- Luke is a handy development and diagnostic tool, which accesses already existing Lucene indexes and allows you to display and modify their contents.
- OpenGrok is a fast and usable source code search and cross reference engine.
- Megite Discover is a crowdsourcing service for web browsing provided by Megite, a leading social news aggregator.
- Classifier4J is a Java library designed to do text classification.
- Heritrix is the Internet Archive's open-source, extensible, web-scale, archival-quality web crawler project.
- CodeCodex is a wiki for finding and improving code. Stop reinventing the wheel.
- A unified, extensible interface for working with applications, contacts, music, and other data.
- Type a query or Navigate the cloud, Refine your cloud, Save it! Share it!
- Beagle is a Linux desktop-independent service which transparently and unobtrusively indexes your data in real-time.
- You might want to build custom indices of documents for many reasons. A widely cited one is to supply search functionality to a web site, but you also may ...You might want to build custom indices of documents for many reasons. A widely cited one is to supply search functionality to a web site, but you also may want to index your e-mail or technical documents.
- Swish-e is a fast, flexible, and free open source system for indexing collections of Web pages or other files. Swish-e can index plain text, e-mail, PDF, H...Swish-e is a fast, flexible, and free open source system for indexing collections of Web pages or other files. Swish-e can index plain text, e-mail, PDF, HTML, XML, Microsoft Word/PowerPoint/Excel and just about any file that can be converted to XML or HTML text. Swish-e is also often used to supplement databases like the MySQL DBMS for very fast full-text searching.
- Storage is an exciting project to replace the traditional filesystem with a new document store.
- Shows how to implement tagging based on symbolic links in a filesystem (with perl). Can be useful for Linux.
- CHI '05: CHI '05 extended abstracts on Human factors in computing systems, page 1505--1508. New York, NY, USA, ACM Press, (2005)
- Computer Networks and ISDN Systems 30(1-7):107--117 (April 1998)


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