Open Source Mac Search Software

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.

MySearchEngine (Personalized Search Engine) is a Java software to search files and folders in an OS file system. It differs from general OS file search engines in that it personalizes the indexing setup so that users can choose which directories to index or remove from an existing index and it can also suggest queries just like Google's "Did you mean" feature. The customization of indexing and query suggestion greatly improves search speed and make user experience more comfortable. eLibrary can also extract text content from files of many wildly used file types such as pdf, doc, ppt, and mp3 to improve the index quality.

Python script for doing mass extended-regular-expression based replacements on a stdin stream.