mcount

mcount is a very small (as in tiny) C program that gives you exactly one thing: a web counter. I developed mcount when my webserver was running on a DECstation 5000/240 with 64MB of RAM (and the CERN webserver), and believe me, things like that were slow on that box. So, if your webserver is quite underpowered this might be for you. The only prerequisites are the (fantastic) GD-library by Thomas Boutell and the ability to run CGI scripts. Well, and a C compiler, obviously. You can see it in action here:

some number you can't see because you're using a text browser... eww!

Isn't much, but the binary isn't either :) Download here, but be prepared to do some reading and/or reprogramming. I just extracted it, typed "make" and put it in my /cgi-bin directory, your mileage may vary.