Count.cgi is a highly-configurable, easy to use counter.
Use this command in your HTML wherever you want to insert a counter:
<IMG SRC="/cgi-sys/Count.cgi?df=username-index.html">
The filename for df= must be your username, a dash, and a keyword
or filename that will let you keep track of which counter you're using.
Slashes and tildes are not allowed. Count.cgi keeps one counter
in each file; the naming format is required to avoid conflicts with other
users.
There is an extensive list of options available with Count.cgi;
they are documented fully on its home page (see URL above). We have a variety of custom-designed counters installed and also add user counters on request.
Available counter patterns (counter style is bold, ie: dd=A):
<img src="/cgi-sys/Count.cgi?df=username-index.html&dd=A">

<img src="/cgi-sys/Count.cgi?df=username-index.html&dd=B">

<img src="/cgi-sys/Count.cgi?df=username-index.html&dd=C">

<img src="/cgi-sys/Count.cgi?df=username-index.html&dd=D">

<img src="/cgi-sys/Count.cgi?df=username-index.html&dd=E">

<img src="/cgi-sys/Count.cgi?df=username-index.html&dd=F">

<img src="/cgi-sys/Count.cgi?df=username-index.html&dd=G">

<img src="/cgi-sys/Count.cgi?df=username-index.html&dd=H">

<img src="/cgi-sys/Count.cgi?df=username-index.html&dd=I">

<img src="/cgi-sys/Count.cgi?df=username-index.html&dd=J">

<img src="/cgi-sys/Count.cgi?df=username-index.html&dd=K">

<img src="/cgi-sys/Count.cgi?df=username-index.html&dd=L">

<img src="/cgi-sys/Count.cgi?df=username-index.html&dd=M">

<img src="/cgi-sys/Count.cgi?df=username-index.html&dd=N">

<img src="/cgi-sys/Count.cgi?df=username-index.html&dd=O">

<img src="/cgi-sys/Count.cgi?df=username-index.html&dd=Q">

If you are carrying over a count value from a previous hosting provider, you can specify the starting value of any counter by adding the parameter
st=. For example:
<IMG SRC="/cgi-sys/Count.cgi?df=sigma-index.html&st=1000">
This example creates the counter for sigma-index.html, with an
initial value of 1000. You can only do this for the first use of a
counter; if you need an existing counter updated to a new value, please
let us know and we'll take care of it right away!
Advanced users should try some of the cool configuration options documented on the Count.cgi web site: http://www.muquit.com/muquit/software/Count/Count2_5-ex.html.