Arch is an extension of Apache Nutch (a popular, highly scalable general purpose search engine) for intranet search. It includes blind test evaluation tools for comparing to other search engines. Arch has many features critical for corporate environments, such as document level security.
InstaSearch is an Eclipse IDE plug-in for performing quick and advanced searches of source code files. It uses the Apache Lucene library for indexing and fast searching of files in the workspace. The search is performed instantly as you type, and resulting files are displayed in an Eclipse view. Each file then can be previewed using a few of the most closely matching and relevant lines. A double-click on the match leads to the matching line in the file.
FM SiteSearch Pro is a quick and simple solution to adding professional search capability to a Web site. It comes with a relevance engine, control panel, large Web site support, MySQL support (optional), search/keyword statistics, advanced searches, and specialized searches, and is fully customizable. It also comes with a setup interface.
Yioop! is a PHP search engine. Yioop! can be configured as either a general purpose search engine for the whole Web or it can be configured to provide search results for a set of URLs or domains. Yioop can crawl pages or can directly index archives such as ARC and WARC. It supports indexing several file formats such as HTML, Atom, PDF, DOC, PPT, RTF, RSS, XML, SVG, PNG, JPG, BMP, GIF, and sitemaps. The Yioop! crawler can be deployed on one or many machines. It supports having one or more to crawl scheduler processes, as well as multiple fetchers and mirrors. Crawling respects robots.txt including Crawl-delay. Yioop! crawls are stored in a Web archive format that is easy to move around. Crawling can be done on one machine and the results deployed elsewhere. Yioop! supports mixing of crawls. Yioop! comes with a search front end that can be localized as desired using a GUI. This GUI supports RTL languages. Management of crawls can also be done using this GUI. Yioop! can be configured in a straightforward manner to make use of file caching or memcache if available.
RestPose is a search engine. It is designed to take a set of documents and then, when given a query, to return ranked lists of documents which are a good match for that query. RestPose manages a set of internal indexes and provides an interface (over HTTP, in a fairly RESTful style, using JSON as the main transfer format) which allows documents to be submitted and removed from indexes, and which allows searches to be performed.
Find What I Mean aims to provide a searching library that tolerates errors in queries. It will auto-correct typos, extra letters, and so on. This is extremely useful when searching for an item in a list. In traditional search methods the query must be perfect or you get zero matches.
Libcolumbus is a small error tolerant search engine designed to deal with noisy data and typos. It will power the searches in the next generation of Ubuntu's HUD system as well as other searches. It has a fast implementation of the Levenshtein distance algorithm, which allows it to correct errors such as added and dropped letters (e.g. 'bar' -> 'bard'), changed letters ('ctr' -> 'car') and translations ('acr' -> 'car'). It also allows the user to customize the error values. Libcolumbus is designed to be small, efficient and easy to embed. It is programmed in C++ but also provides C and Python APIs.
Web Search Script can search the contents of a text file stored on your server by editing the script source code, or the file location can be left blank to allow your users to enter a URL to a text document stored on a remote Web server. Search results will be listed by line number, with contextual information surrounding the search term. Clicking search results will scroll the complete text in the right pane to the result's location in the complete text.