- Empty XHTML 1.0 page, ready to go, empty XHTML 1.1 page
- CSS that sets overall colours
- minimal web script, web script source
- form with CGI script in Python, Python CGI script source
- form that's careful about input/output, Python CGI that accounts for injection and Unicode (try input like “<foo>& π€” in both)
- form with CGI script in Perl, Perl CGI script source
- form with script in PHP, PHP script source