Click2U delivers two free programs to emulate Playstation 2 and Xbox consoles on PC.
Click-2U Playstation 2 Emulator contains all plugins and BIOS, so it doesnt requires particular settings.
In the PS2 emulation i also want post PCSX2 for Windows and Linux.
If you know other free working emulation software of these consoles (and also others, why not) please write about them in comments, thanks!