Free Server-side Scripting

Server-side scripts are scripts which run on your Webserver. Most Webspace providers support PHP and Perl.
PHP
Easy yet powerful scripting language for creating WWW scripts available for a very large number of platforms. Supports object-oriented programming. Most Internet providers offer PHP as part of their Webhosting packages.See also below.
Perl
Perl is an extremely powerful and widely supported scripting language, mostly used for creating WWW scripts. Supports object-oriented programming. Rather difficult to use for Perl-beginners. Most Internet providers offer Perl as part of their Webhosting packages.
Zope
A free, Open Source(tm) web application platform used for building high-performance, dynamic web sites.
Python
Python is an interpreted, interactive, object-oriented programming language. It is often compared to Tcl, Perl, Scheme or Java.Python combines remarkable power with very clear syntax. It has modules, classes, exceptions, very high level dynamic data types, and dynamic typing. There are interfaces to many system calls and libraries, as well as to various windowing systems (X11, Motif, Tk, Mac, MFC). New built-in modules are easily written in C or C++. The Python implementation is portable: it runs on many brands of UNIX, on Windows, DOS, OS/2, Mac, Amiga, etc. Python is copyrighted but freely usable and distributable, even for commercial use.
Rebol
Free for non-commercial use. Very easy to use and elegant interpreted language useful for creating Web applications. Rebol supports object oriented programming. It includes 14 Internet protocols, like HTTP, FTP, CGI, SMTP, POP, etc.Rebol runs on more than 20 platforms, which means that the scripts listed on the Rebol site will not only be able to run on Windows but will also run on Solaris, Irix, NetBSD, OpenBSD, BSDi, BeOS, Mac, AIX, HPUX, Amiga, Linux, etc.Rebol/Command, (which is not free) provides additional features:Direct database access to: Oracle 8 (Windows, Solaris Sparc, and Linux libc6 systems) MySQL 3, ODBC access (from Windows) to: Access, Excel, MS SQL Server, Oracle, MySQL.Also: FastCGI, SSL, TLS, HTTPS, SSLv2, SSLv3 and TLSv1, DES, 3DES, ARCFOUR, RSA keys and DSA/DH keys, Blowfish, Rijndael/AES.
Java Servlets
Java 'applets' which are executed on the server, resulting in a dynamic page that can be viewed in the client Webbrowser.
ASP2PHP
Free tool to convert Microsoft ASP Web scripts to PHP scripts.