cgic - CGI C/C++ Library

http://www.boutell.com/cgic/

cgi-lib.pl

http://www.bio.cam.ac.uk/web/form.html

CGI::* Modules

http://www-genome.wi.mit.edu/WWW/tools/scripting/CGIperl

EIT's CGI Library for C/C++

http://wsk.eit.com/wsk/dist/doc/libcgi/libcgi.html

Grant's CGI Framework for the Macintosh

http://arpp1.carleton.ca/grant/mac/grantscgi.html

libwww

/CPAN/modules/by-authors/Gisle_Aas in the CPAN archives

Python CGI Library

http://www.python.org/~mclay/notes/cgi.html

uncgi

http://www.hyperion.com/~koreth/uncgi.html