Flax is a high-performance search system based on open source software licensed under the LGPL. Flax can build searchable indexes of millions of documents in common formats such as Microsoft Office, HTML and Adobe Acrobat (PDF), which can then be searched in milliseconds using a customisable interface to meet specific needs. Flax is cross-platform, integrates seamlessly with your existing infrastructure and provides highly accurate and relevant results. [more]

Xapian is an Open Source Probabilistic Information Retrieval library, released under the GPL. Xapian may be used to build powerful, fast search applications over hundreds of millions of documents on a variety of computing platforms. Lemur Consulting offer a support package for Xapian and various extra software including build tools and prebuilt binaries for Windows platforms. [more]

A collaborative, web-enabled database system for researchers. It is easy to store text, images, sound and video in Bamboo, while the powerful probabilistic search engine at its core enables you to quickly find what you're looking for.

Bamboo makes it natural to discover new facts and connections. It was developed in conjunction with the University of Cambridge, and is available for Windows, Linux, MacOS and other platforms. [more]