Collaborative name/domain search via a Trello-like board

fu lets you search commindlinefu.com from the command line, and copy the handy one-liners you find to the clipboard.

Tiny ack-style file search utility

Written in Bash.

Quickly search for a unicode characters by entering its name (or something close to it).

"Code Search is a tool for indexing and then performing regular expression searches over large bodies of source code. It is a set of command-line programs written in Go. Binary downloads are available for those who do not have Go installed."

Apartment search done well

rich source code search in pure Python. much like Ack.

"A Xapian-backed “personal full text search tool for Unix/Linux” that aims to index every bit of text on your machine, to the extent that it’ll find the contents of “an MS-Word document stored as an attachment to an e-mail message in"

Chrome-style unified address+search bar for Safari

"ThriftDB is a document-oriented datastore with search built-in.

ThriftDB is built on top of the Thrift serialization protocol. Using ThriftDB, you can add/delete/modify attributes on the fly without any downtime. You can also perform full-text searches or faceted queries across items. ThriftDB is flexible, highly scalable, and extremely fast."

"a full-text search engine library written in C and targeted at dynamic languages. It is a "loose C" port of Apache Lucene™, a search engine library for Java."

mairix is a program for indexing and searching email messages stored in maildir, MH or mbox folders.

"Organize your search all in one place and keep track of the apartments you really love. Nestio helps you stay informed and make the best decision on your next home."

So, we build a web site or an application and want to add search to it, and then it hits us: getting search working is hard. We want our search solution to be fast, we want a painless setup and a completely free search schema, we want to be able to index data simply using JSON over HTTP, we want our search server to be always available, we want to be able to start with one machine and scale to hundreds, we want real-time search, we want simple multi-tenancy, and we want a solution that is built for the cloud.

"This should be easier", we declared, "and cool, bonsai cool".

elasticsearch aims to solve all these problems and more. It is an Open Source (Apache 2), Distributed, RESTful, Search Engine built on top of Lucene.

"Netspeak helps you to improve your writing.

When searching for words, Netspeak can give you directions. Our dictionary contains billions of phrases and how commonly they are used."

ITA Software's data scraping, aggregation, and search/database engine.

Simple programmable spidering of web sites with node.js and jquery.

"This node.js project is a simple programmatic web spider, powered by jQuery. It has a very small code base (~200 SLOC), yet offers custom user agent strings, connection pools, and memory cache."

Read the Docs hosts documentation, making it fully searchable and easy to find. You can import your docs using any major version control system, including Mercurial, Git, Subversion, and Bazaar. It also supports webhooks so your docs get built when you commit code. There's also support for versioning so you can build docs from tagged versions of your code in your repository. You can even create docs on the site. It's free and simple. Read Getting Started and find out how to host your docs on Read the Docs!

Octopart is a search engine for electronic parts.

"Pattern is a web mining module for the Python programming language.
It bundles tools for data retrieval (Google + Twitter + Wikipedia API, web spider, HTML DOM parser), text analysis (rule-based shallow parser, WordNet interface, syntactical + semantical n-gram search algorithm, tf-idf + cosine similarity + LSA metrics) and data visualization (graph networks).
The module is bundled with 30+ example scripts."

" A self-hosted web app, similar to ThinkUp, that lets you archive, browse, and search your Twitter account. You’ll need your own web host, PHP 5.2, and MySQL 4.1."

enter a phrase from a movie and it tells you which movie, the time within the movie, and links to it at Netflix

"CloudMagic introduces super fast search for your online data<br />
<br />
Now available for Gmail & Google Apps Email <br />
Coming Soon: Support for Google Docs, Hotmail, Yahoo & Others "

Awesome interactive map from Kayak answering "where can I fly for <= $XXX"

Wine search engine.<br />
"Search 23 million pages of trustworthy wine information."

"Queriac allows you to manage your quicksearches, shortcuts, and bookmarklets by taking them out of your browser profile and onto the web, making them portable, taggable, shareable, and generally easier to manage. Drawing from the concept of Yubnub and extending it in the spirit of del.icio.us, Queriac effectively turns your browser's address bar into a flexible command line."

"Quick Scroll lets you jump directly to the relevant bits of a Google search result."

"VisualAck is like grep (or ack), except faster and with UI. For Mac."

"ZocDoc is a free service that allows patients to book Doctor appointments online." Search by zip code, specialty, and insurance.

"YouTube Music Discovery Project and Playlist Creation Tool"

A command line interface to search at commandlinefu.com

"easy-to-use, syncable, searchable notes application for iPhone"

CRM reinvented for the news feed: indexes email (Exchange/Outlook, Gmail, etc.), LinkedIn, Facebook, and web/blog searches for related content to every contact in your inbox.

Domai.nr makes finding pithy URLs easy by querying 280 top-level domains and another 2,014 second-level ones for domain hacks, turning real English words into unique and memorable Web addresses.

Searchable Twitter deals, coupons, bargains, sales and discounts. Solid way to find coupon codes.

A comparison shopping engine that transcribes a full history of price fluctuations and allows you to see how good of a deal a deal really is.

An extensible quick-search and shortcut bookmark. Shortwave responds to commands. A command consists of a predefined trigger plus optional search terms. Shortwave is perfect for iPhone/iPod touch and anyone using multiple browsers/computers on a regular basis. Because no data is stored in the bookmark (other than the url of your custom commands file) every browser you use stays in sync automatically.

Watch, search and monitor the Twitter public timeline in real-time. Desktop app in Adobe Air.

How long will your favorite food or beverage stay safe and tasty? What's the best way to store it? Get the answers for thousands of items!

a downloadable, smart searchable Ruby on Rails API with a great interface. Each method in the docs links to the corresponding method definition on GitHub.

Lucene-based search server with relevance and browsing capabilities

adds a keyword-based search to your Safari address bar. It also makes it easy to add your own commands for sites you want to search often. For instance, you could make a gh keyword that searches GitHub repositories instead of relying on the search bar or being on the site itself. Of course, it’s in Objective-C, and all the source is available if you want to see how plugins for Safari work. alexstaubo has even wrapped up some DMGs for easy installation along with a nice project site as well

MarkMail is a free service for searching mailing list archives, with huge advantages over traditional search engines. It is powered by MarkLogic Server: Each email is stored internally as an XML document, and accessed using XQuery. All searches, faceted navigation, analytic calculations, and HTML page renderings are performed by a small MarkLogic Server cluster running against millions of messages.

Design your own Round The World flight Use our unique interactive map to search and compare our database of 1000's of Round The World (RTW) itineraries

ack is a tool like grep, aimed at programmers with large trees of heterogeneous source code.

Instant, easy server-side import of delicious into Google bookmarks

Usniff.com is a fast, easy to use, cool looking and free real-time torrent search engine that crawls 8 different torrent web pages (for now) to give you the best results for your search.

Seeqpod-powered MP3 search engine with downloading capability

TinEye is an image search engine built by Idée currently in beta. Give it an image and it will tell you where the image appears on the web.

Create and play an instant mixtape of songs, from Seeqpod, etc. Muxtape on steroids.

a distributed storage system for managing structured data that is designed to scale to a very large size across many commodity servers, with no single point of failure. Reliability at massive scale is a very big challenge. At this scale, small and large components fail continuously. Cassandra manages the persistent state in the face of these failures drives the reliability and scalability of the software systems relying on this service.

Usable MP3 search

Sphinx is a full-text search engine, distributed under GPL version 2. Commercial license is also available for embedded use. Standalone, fast.

EveryBlock is a new way to keep track of what’s happening on your block, in your neighborhood and all over your city. Crimes, inspections, media coverage, ...

searchable/linked OS X XNU Darwin kernel source

Discovering the database of Spotlight metadata search predicate keywords

Javascript enhanced Rails API docs, available for static offline download

Leaflets are fun, useful applications designed to run fast on your iPhone. Upcoming, Flickr, del.icio.us, Google/Yahoo/MSN search, ...

Revolutionary search tools and stats for your blog

Web 2.0 vacation/travel agent aggregator

Simple overview/rules of thumb: Eliminate dangling pages, Aggregate out links on pages with many site links, Split long pages into several pages