What script are these sites running (TGP style, NSFW)?

Hi,

I apologize in advance if this question doesn't fit this forum.

Could anyone please shed some light on the engine behind those TGP style gallery pages?

I'm looking to create something similar and I've looked on what's available on the market today, none of what I've found match what these sites have (I'm not looking for an awesome TGP engine, just auto-updating image galleries that are not hosted on my server).

NSFW, but no ads, clean sites.

erotica(dot)writech(dot)net(dot)ee/index.php?id=galeriid
tutvus(dot)writech(dot)net(dot)ee (scroll down to the bottom)

Feel free to suggest other solutions for similar end result.

Thanks!