Just an OS4 compile of bmp2ico. From the homepage:


This is a little program I wrote that will archive multiple bmp's of dimensions
16x16, 32x32, and/or 64x64 into a Windows .ico file which can be used as a
favicon.ico file for your web page. The program takes 2 or more command line
arguments. The first is the output .ico file and any thing after that are
considered bmp's. So for example, if you wanted a favicon.ico made out of 2
bmp's called pic1.bmp and pic2.bmp you can type from the command line:

bmp2ico favicon.ico pic1.bmp pic2.bmp

I'm not sure why you'd want multiple bmp's in a favicon. Maybe the web
browser will pick the best sized icon to diplay. Multiple sized icons are useful
tho for icons for your Windows executable files. By the way, my Ringtone Tools
program can create .ico files also.