There are several ways to bulk rename files in Linux. If you want to bulk rename files with a GUI tool, try Thunar file manager, or Krename.

Free Scripts

You can download free scripts to add to your webpages, or just to study. Many of these sites combine free and commercial scripts in the same listings.

Links to Free Scripts

Hotscripts.com -- free and commercial scripts. This is one of the bigger sites and is very well done.
ScriptSearch.com -- free and commercial scripts for download. JavaScript, Perl, PHP, Java, and more.
DynamicDrive.com -- Free DHTML scripts.
Matt's Script Archive -- free Perl scripts for your website.
CGI Resources -- free scripts in Perl and other languages.
Free-Scripts.net -- free Perl scripts.
Java-Scripts.net -- free JavaScripts.
FreeScripts.com -- free scripts.

Perl

Perl (Practical Extraction and Report Language) is widely used on the Internet to make websites dynamic. It can also be used for other interesting tasks like making web spiders (programs that search the web and can gather and process information for you). The following links include introductions and tutorials for learning Perl. If you want to do web programming with Perl and are using Windows download the Apache2Triad package (mentioned in the PHP section). It includes Perl, the Apache server, PHP, MySQL, Python and more.

If you are using Linux, Perl is probably already on your computer. You can run Linux on your Windows computer by using a Linux live CD like Knoppix or SLAX. See the Linux page for more information. Perl also comes pre-installed on Mac OS X.