i use these scripts (or variants) on my site, and they work well for me, i hope they'll work well for you, too. in general, if there's cgi source for a page, you will need to get both the page and the cgi itself. also, you don't need any other stuff, no libraries, no c code, etc. you will need perl on unix, though, because all my cgi scripts are in perl. these are intended for those looking for cgi scripts that they can use and learn from. they're really not plug-and-play, but don't let that discourage you!
	feedback.cgi perl cgi script for a feedback form. click here for the html page this script drives
	guestinfo a description of my guestbook scripts; you'll really need to read this if you want to use my guestbook
	guest.cgi perl cgi driver for the guestbook sign-in page which you can find here
	gbmaint unix command line menuing program to control your guestbook (you choose whom to move into the permanent guestbook)
	homecounter.cgi a very simple perl cgi driver for a page hit counter.
	pix2web a perl program to create a web page for a directory full of images. this isn't a cgi script, but it does create web pages
	if you'd like to learn Perl, i would suggest "Learning Perl" by Randall Schwartz and "Programming Perl" by Larry Wall, both published by O'Reilly.