Firstly hi and welcome to ethicalhacker.net.

Development tools for most programming languages are available for download from the Internet. In fact you probably already have the tools write programs in one or more languages on your computer already. The list is very large, perhaps if you let us know what programming experience you have and what wish to learn we can make some suggestions.

If you are looking for a version of Linux to practice ethical hacking I suggest you look at one of the live CD distros like Backtrack or Auditor. If you have a CD writer you can download the ISO image and create a bootable CD with no need to install it on your hard drive.

Regards,
Jimbob

I already know how to program in Pascal,  and now i want to learn per, c or python.If none of this languages are free for download, i want one that is free.