"More often than not, the mobile experience for a web application or site is designed and built after the PC version is complete. Learn the three reasons web applications should be designed for mobile first instead: mobile is exploding; mobile forces you to focus; and mobile extends your capabilities."
"Not everyone realizes it, but depending on the web browser used to open your email in Hotmail, Gmail, and others, it can be rendered quite differently."
ImageAlpha is a GUI for pngnq and pngquant. It allows you to easily generate paletted PNG images with full alpha channel and test how it will look against different backgrounds.
The application allows users to experiment with color combinations, examine them under the aspect of accessibility guidelines and to create custom color palettes.