with favicon.cc design a new or edit your favicon icon and add it to your website.
favicon.cc is the best favicon designer site i have ever seen.

what is favicon?

the icon besides the url in the address bar of the browser, is called favicon. and it's extention is (.ico)

Features:

• you can even upload an image file in any image format in jpg, gif, png, bmp, ico to edit
  the image for using it as a favicon of your website. there is a import image link to do it.
• it shows the live preview with actual size just below the designing box.
• it allows to pick existing color from anywhere in the design box.
• you can also specify your hexa decimal colour code by clicking on the colour code
  shown above the pellete.
• you can also make the icon with transparent effect.
• Optionally you can publish it under the CC (Creative Commons) license

you can add the favicon icon to your website by putting bellow lines in your code.
<link rel="shortcut icon" href="http://myfavicon.com/favicon.ico" />
<link rel="icon" href="http://myfavicon.com/favicon.ico" />
Replace "http://myfavicon.com/favicon.ico" with the URL of where your webspace stored your ico file, re& paste the code between the head tags of your blog.

Related:

• Adding a favicon
• Favicon from pics
• Mpp favicon gallery
• Favicon Collection