Modern Web Development
Screenqueri.es | Pixel Perfect Responsive Design Testing Tool
Sweet
WebPagetest - Website Performance and Optimization Test
Is It Old?
Ceck your link before posting it on Twitter
ifttt / Dashboard
A great way to automate tasks on the internet via various channels using numerous triggers
20 Useful Tools for Responsive Web Design
ColorPicker.com : Quick Online Color Picker Tool
Nice colour picker
Gridulator: Make pixel grids, lickety-split
Tell Gridulator your layout width and the number of columns you want, and it’ll spit back all the possible grids that have nice, round integers
Ultimate List of HTML5 and CSS3 Tools | Admix Web
great tools that can help you to master these new features of both HTML5 and CSS3
ProtoFluid - HTML5 and CSS3 Web App Prototyping
Test your @media queries and web app on various screen sizes
Flickr Link Shortener/Expander
Handy to grad a short Flickr URL
HTML5 Readiness
Compare browser support of HTML5/CSS3 features
CSS Border Radius
Try out border radius and copy/paste css
iPhone / iPod Touch Backup Extractor
Indispensable
Web Font Specimen
See how type looks on the web
Vikjavev.no - Unsharp Mask for PHP
Clever
Viewfinder: Flickr search tool
Viewfinder is a Mac OS X application that dramatically simplifies the process of finding, downloading and using images from Flickr.
Closure Tools - Google Code
Open source JavaScript compiler, debugger, library, and templating system from Google
Snow Leopard Compatibility: SnowChecker
Tells you whether or not your applications will run under Mac OS X 10.6 Snow Leopard
Deutsch-Französisch Wörterbucj
Lessn // ShaunInman.com
Run your own url shorteners
Rollip - Create Polaroids from your photos!
Cool online app to ceate your own Polaroid shots. Different settings and options are available.
Conditional-CSS
Conditional-CSS allows you to write maintainable CSS with conditional logic to target specific CSS statements at both individual browsers and groups of browsers.
WriteMaps Site Map Application.
Create, edit, and share your sitemaps online