Authors and hackers:

 Vladimir Sibirov (Trustmaster)
 Country: Russia
 Original Founder, Programmer, Sleeping member.
 Developed 1.0, 1.1-1.3, 1.4

 Lars Olson (L505)
 Country: Canada
 Programmer, Leader, Core
 Developed 1.5, 1.6, 1.7, extras, demos.

 Jorge Aldo Gomes de Freitas Junior 
 Country: Brazil
 Programmer, Extras, Tools
 Developed: Lightwebserver, PWebApplication, extras

 Amir Aavani
 Country: Iran
 Programmer, Extras
 Developed O-PSP Branch

 Anthony Henry
 Country: USA
 Programmer, core, sleeping member.
 Development for Powtils 1.5, 1.6