Pick a base size, choose a scale and see the results. Nice.
A solid collection of tools to help speed up your photoshopping.
Get annotated feedback on your designs, quickly and easily. Very slick, if you can stand the horrible, overly friendly copy.
Photoshop actions for preparing designs for iOS or Retina-display websites.
HTML5 app for creating crisp mockups, wireframes & interactive prototypes.
Simply type in a URL and get a colour usage breakdown for that page. Which might be of use to someone, somewhere.
Prose is a web-based interface for managing text-based content in your GitHub repositories. Use it to create, edit, and delete files, and save your changes directly to GitHub.
Dbpatterns is a service that allows you to create, share, explore database models on the web. And also you can fork already created database models.
Never sure about these things, mainly because I'm not so certain about this heavy reliance on JS only Apps. Well documented effort though.
Catches and displays your PHP errors with full stack trace and syntax highlighting in your browser.
'Anchor is a content management system, written in PHP5, built for art-directed posts' And it's free. Which is nice.
xip.io is a magic domain name that provides wildcard DNS for any IP address. Useful for testing local development sites on your iPads, iPhones, and other computers.
Setup a stack in seconds, code in the browser or via SSH.
Apps, Tools, and Resources creative professionals to improve Productivity & Creativity. (Featuring Nylllon of course).
Music fingerprinting for everyone.
Koken is a free system designed for photographers, designers, and creative DIYs to publish independent web sites of their work.
The trashman examines your site's live DOM and reverse engineers a new, more elegant definition that captures styles down to the pixel.
Forget VMs, screenshot services, or dedicated testing computers. BrowserTap works by broadcasting a live RTMP stream of a browser window on a cloud server.
Postbox is a desktop email application for Mac and Windows, and a system for managing your life.
I've been using this for around 8 months. It's one of those apps you wonder how you managed without it. It's keyboard-based note-taking, with search and integration with Simplenote. It's a fork of Notational Velocity.
No invite yet, but from what I see from their blog (http://blog.koding.com) Koding seems to offer all kinds of collaboration-coding tools via your web browser (for free). Version control springs to mind, as does my code trusted to the "cloud".
JPEGmini is a patent-pending photo recompression technology, which significantly reduces the size of photographs without affecting their perceptual quality.
App that allows you define your common activities (such as 'design' or 'invoicing') and open/close applications, control chat status etc.
A beautiful Wikipedia reader for your iPhone and iPad that visualizes the connections between articles.