General:

• The CGI Resource Index: More than 2600 scripts written in various languages (Perl, PHP, C, C++, etc.)
• PHP web site: PHP documentation, links and downloads.
• Perl web site: Perl home.
• Comprehensive Perl Archive Network (CPAN): Several Perl resources.

For Windows:

• PHP: Official PHP interpreter for Windows.
• ActivePerl: ActiveState's free port of Perl for Windows platforms.
• ActiveTCL: ActiveState's free port of TCL for Windows platforms.
• ActivePython: ActiveState's free port of Python for Windows platforms.

For MacOS X/macOS and Linux:

• PHP: PHP package.
• Perl: Perl download.