Arch Search Engine

Arch is an open source extension of Apache Nutch (a popular, highly scalable general purpose search engine) for intranet search. Not happy with your corporate search engine? No surprise, very few people are. Arch (finally!) solves this problem. Don't believe it? Try Arch, blind test evaluation tools are included. In addition to excellent search quality, Arch has many features critical for corporate environments, such as document level security.