Unix validation tools - Introduction

What are the benefits of these tools - beside the portability between Unix and Linux?

The following tools are available (see the manual for a detailed option's description):

With many tools (if it makes sense) come some so called "visual tools". They perform partial tasks and can be used independent of a complete user input request. And here they are:

I think, the benefits are obvious: easy to use for both programmer and user, ready to work in almost every environment. That's why I implemented the Perl module in order to make it just as easy for you to integrate it in your Perl programs.