responsivepx - find that tricky breakpoint
►http://responsivepx.com
Enter the url to your site - local or online: both work - and use the controls to adjust the #width and #height of your #viewport to find exact breakpoint widths in pixels. Then use that information in your #media_queries to create a #responsive_design.
#Sprite Cow - Generate #CSS for sprite sheets
►http://www.spritecow.com
Sprite Cow helps you get the #background-position, #width and #height of #sprites within a spritesheet as a nice bit of copyable css.
{ visibility: inherit; } IE6 min/max - height/width
►http://www.visibilityinherit.com/code/ie6-min-max-height-width.php