Another option for generating grids.
toolbox
Brand Colors+
Quick access to major online brand colors.
Ipsum.me+
An advanced placeholder text generator that fills in names and cities.
Jquer.in+
Like The Toolbox, but for jQuery plugins.
WebPageTest+
Test your website’s performance and get a nice graph.
Codepen+
A powerful online editor supporting HAML, SASS, Coffeescript, and more.
The Responsinator+
Another good option to test your design at multiple sizes.
Cropp.me+
Auto-crop images in multiple sizes.
@FontFace Generator+
Generate an @font-face-compatible font from a font file.
Kuler+
By popular demand: Adobe’s well-known color picking tool.
CSSPainter+
This tool lets you combine multiple effects to create complex pure CSS objects.
Testico+
Preview your app icon in various settings.
Browser Cover+
Quickly add various browser chrome frames to any image
Pixabay+
A search engine for public domaine images.
The Pixelator+
Pixelate images and combine multiple effects.
MF Animated Gif+
This creatively named site lets you build animated gifs from separate images.
Freepik+
A search engine for free vectors and photos.
Gridulator+
Specify the total width and number of columns, and get different options for column width and gutters.
Icon Finder+
Search through more than 150,000 free icons.
LoremPixel+
Get placeholder images in any size, for any occasion.
SpritePad+
Generate sprite sheets by drag-and-dropping images.
IcoMoon+
Select icons (or your own vector files) and generate a pictogram font from them.
Mobile UI Patterns+
A gallery of mobile user interfaces organized by interaction patterns.
HTML5 Please+
Look up advanced HTML5 and CSS3 features and find out which browsers support them (hint: not IE).
AjaxLoad.info+
A great source for animated spinners and various loading gifs.
CSS Selectors+
Brush up on your CSS selectors with live examples.
Placehold.it+
Generate placeholder images just with an URL.
Pictaculous+
Generate a color palette from any image.
Support Details+
Send someone here to help them figure out their browser and computer configuration.
Pattern Tap+
Huge design inspiration gallery organized by tags.
Mocku.ps+
Upload and share design mockups, and give them a nice backdrop.
0 to 255+
Quickly get color shade variations for any color.
RegExp Generator+
Helps you generate regular expressions from a string.
Responsive Test+
A beautiful bookmarklet to test your designs at multiple sizes.
Ribbon Builder+
Build a fancy ribbon with nothing but CSS.
BrowserUI+
A Photoshop action that quickly ads a browser frame around any image.
Layer Styles+
Create CSS3 styles using the Photoshop Layer Styles UI right in your browser.
DropMocks+
DropMocks lets you upload images and create a gallery without even having to register.
Readability+
This bookmarklet automagically strips the current page of its layout to make it easier to read.
Pea.rs+
Common patterns of markup and style for various elements such as tables, lists, etc.
