Instant coding answers via the command line.
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.
Popcorn Maker makes it easy to enhance, remix and share web video. Use your web browser to combine video and audio with content from the rest of the web — from text, links and maps to pictures and live feeds.
Selfspy is a daemon for Unix/X11 and (thanks to @ljos!) Mac OS X, that continuously monitors and stores what you are doing on your computer. This way, you can get all sorts of nifty statistics and reminders on what you have been up to. It is inspired by the Quantified Self-movement and Stephen Wolfram's personal key logging.
WebScarab is a framework for analysing applications that communicate using the HTTP and HTTPS protocols.
Extends Twitter Bootstrap with additional lightweight JavaScript controls. Easy to install, customize, update, and optimize. All functionality covered by live documentation and unit tests.
IcoMoon is an icon solution, providing three main services: Vector Icon Packs, The IcoMoon App, and an Icon Delivery Network.
Top Network Security Tools
Compass is an open-source CSS Authoring Framework.
Grunt is a task-based command line build tool for JavaScript projects
PhantomJS is a headless WebKit with JavaScript API. It has fast and native support for various web standards: DOM handling, CSS selector, JSON, Canvas, and SVG.
Git extensions to provide high-level repository operations for Vincent Driessen's branching model.
Tool for finding memory leaks in JavaScript programs.
Dependency Manager for PHP
Alembic is a new database migrations tool, written by the author of SQLAlchemy.
This tool helps to combine iconic webfonts for your project.
DOM Monster is a cross-platform, cross-browser bookmarklet that will analyze the DOM & other features of the page you're on, and give you its bill of health.
ApiGen is the tool for creating professional API documentation from PHP source code, similar to discontinued phpDocumentor/phpDoc.
Sprite Cow helps you get the background-position, width and height of sprites within a spritesheet as a nice bit of copyable css.