Sonar is an open platform to manage code quality.

Mockery is a simple yet flexible PHP mock object framework for use in unit testing with PHPUnit, PHPSpec or any other testing framework. Its core goal is to offer a test double framework with a succint API capable of clearly defining all possible object operations and interactions using a human readable Domain Specific Language (DSL). Designed as a drop in alternative to PHPUnit's phpunit-mock-objects library, Mockery is easy to integrate with PHPUnit and can operate alongside phpunit-mock-objects without the World ending.

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.

WAMP is an open WebSocket subprotocol that provides two asynchronous messaging patterns: RPC and PubSub.

Set of tools for testing with older or newer IE browsers

A minimalist, opensource online pastebin where the server has zero knowledge of pasted data. Data is encrypted/decrypted in the browser using 256 bits AES.

MediaGoblin is a free software media publishing platform that anyone can run. You can think of it as a decentralized alternative to Flickr, YouTube, SoundCloud, etc.

A collection of patterns and modules for responsive designs.

A debugger for RESTful web services.

Ender is a full featured package manager for your browser.
It allows you to search, install, manage, and compile front-end JavaScript packages and their dependencies for the web. We like to think of it as npm's little sister.

Ender is not a JavaScript library.
It's not a jQuery replacement. It's not even a static asset. It's a tool for making the consumption of front-end JavaScript packages dead simple and incredibly powerful.

Peer-to-peer data in the web browser.
PeerJS completes WebRTC as an API abstraction, connection broker, and binary serialization format

Nice write-up on techniques for scaling up a web application.

Codebender is an embedded development platform with an emphasis on the Arduino and it’s completely web-based, so you don’t have to install, manage and update anything.

MySQLTuner is a script written in Perl that will assist you with your MySQL configuration and make recommendations for increased performance and stability.

dbv.php is a database version control web application featuring schema management, revision scripts, and more!

Code review tool for Git projects.

Instant coding answers via the command line.

Baïkal offers ubiquitous and synchronized access to your calendars and address books over CalDAV and CardDAV. Baïkal implements the current IETF recommendation drafts of these industry standards for centralized calendar and address book collections.

Hurl.it makes HTTP requests.

Choose the request method, customize headers and POST parameters, add basic authorization or OAuth credentials, and even follow redirects. Then view the nicely formatted request and response.

It's the perfect tool for testing APIs. Just enter a URL and click send.

Testing an HTTP Library can become difficult sometimes. PostBin.org is fantastic for testing POST requests, but not much else. This exists to cover all kinds of HTTP scenarios. Additional endpoints are being considered (e.g. /deflate). All endpoint responses are JSON-encoded.