My Friends:

• coni
• Hacky
• SoR
• mss
• Szarak
• t0
• Soran
• Zatara

CzLUG:

• Czestochowa Linux Users Group
• Czlug Planet

Programming languages:

• Small perl FAQ (Polish)
• Advanced Bash-Scripting Guide

Other:

• DA Emaus
• KZA