MeiliSearch is a powerful, fast, open-source, easy to use and deploy search engine. Both searching and indexing are highly customizable. Features such as typo-tolerance, filters, and synonyms are provided out-of-the-box.

Jina is a neural search framework that allows to build deep learning search applications in minutes. It provides scalable indexing, querying, understanding of any data: video, image, long/short text, music, source code, PDF, etc.

semgrep is a tool for easily detecting and preventing bugs and anti-patterns in your codebase. It combines the convenience of grep with the correctness of syntactical and semantic search. Developers, DevOps engineers, and security engineers use semgrep to write code with confidence.

Sonic is a fast, lightweight and schema-less search backend. It ingests search texts and identifier tuples that can then be queried against in a microsecond's time.

Sonic can be used as a simple alternative to super-heavy and full-featured search backends such as Elasticsearch in some use-cases. It is capable of normalizing natural language search queries, auto-completing a search query and providing the most relevant results for a query. Sonic is an identifier index, rather than a document index; when queried, it returns IDs that can then be used to refer to the matched documents in an external database.

Browser Extension to full-text search your browsing history & bookmarks.

Searx is a free internet metasearch engine which aggregates results from more than 70 search services. Users are neither tracked nor profiled. Additionally, searx can be used over Tor for online anonymity.

Sourcegraph Server is a free, self-hosted code search server that integrates with your code host and supports multi-repository, regexp, and diff searches.

We extracted the colors from 20 million Creative Commons images on Flickr to make the images searchable by color.

Offline search tool for developers. Find what you need without the need for Internet access. Allows finding detailed information not available in document names. Your own local indexed copy of Stack Overflow downloaded via BitTorrent.

ack is a tool like grep, optimized for programmers

Designed for programmers with large heterogeneous trees of source code, ack is written purely in portable Perl 5 and takes advantage of the power of Perl's regular expressions.

DevDocs combines multiple API documentations in a fast, organized, and searchable interface.

Iconfinder provides high quality icons for webdesigners and developers in an easy and efficient way.

Open Source, Distributed, RESTful, Search Engine

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 Apache Lucene.

Instant coding answers via the command line.

The Hype Machine follows music blog discussions

Search and Analyze the Social Web.

This site is all about connections between music artists. In a sense, it is a music artist recommendation system but more. For each artist, you will see the type of "similar artist" recommendations to which you are accustomed - we use last.fm and The Echo Nest to get these. But you will also see some other inter-artist connections catfish has discovered from the web of linked data. These include things like "artists that are also English Male Singers" or "artists that are also Converts To Islam" or "artists that are also People From St.Louis, Missouri". And, hopefully, you'll get some media for each artist so you can have a listen.

TinEye is a reverse image search engine. It finds out where an image came from, how it is being used, if modified versions of the image exist, or if there is a higher resolution version.

Computational knowledge engine

A social command line for the web