Cgrep is a grep tool suitable for searching in large code repositories. It supports 30 programming languages and searches that go beyond the simple pattern matching. It enables context-aware filtering and semantic searches through wildcard and combinators.
mu is a tool for dealing with e-mail messages stored in the Maildir-format, on Unix-like systems. mu’s main purpose is to help you to find the messages you need, quickly; in addition, it allows you to view messages, extract attachments, create new maildirs…
mu includes an emacs-based e-mail client (mu4e), a simple GUI (mug) and bindings for the Guile/Scheme programming language.
lunr.js is a simple full text search engine for your client side applications. It is designed to be small, yet full featured, enabling you to provide a great search experience without the need for external, server side, search services.
lunr.js has no external dependencies, although it does require a modern browser…
tag is a command line tool to manipulate tags on Mac OS X 10.9 Mavericks files, and to query for files with those tags. tag can use the file system’s built-in metadata search functionality to rapidly find all files that have been tagged with a given set of tags.
Terminology is a browser for the English language – part dictionary/thesaurus and part research tool. Terminology is designed to make it easy to explore words and phrases, diving down to more and less specific terms - accessing the web and other apps for more detail and sharing.
Safari Keyword Search is a simple extension for Safari 5.1 and above that can change the default Safari search engine and enables keyword searching from the address bar. This is a simple but powerful feature that gives you access to several search engines using simple keywords. For example, you can search Wikipedia for information on monkeys by typing w monkeys in the address bar.