You mean you missed perlmod and perltoot? Also, how about Modules: How to Create Install and Use and Object Oriented Programming? I haven't read all those tutorials, but I know where to look for when I need it.
You seem to keep asking simple questions you can easily find the answer for monks at your experience. But, I might be wrong.
Open source softwares? Share and enjoy. Make profit from them if you can. Yet, share and enjoy!