szukajwarchiwach.pl is listed as a site containing "Archival resources online" from Poland. The site has a few menu pages in English but most of it is in Polish. Obviously, all the images of original records are also in Polish. As a result, I am struggling a bit to understand what is available. However, the site looks valuable with more than 7 million scanned images of valuable genealogy records available online.
Many of the digital images are from the State Archives in Warsaw (including branches in Otwock and Grodzisk), Poznan, Lublin, Krakow, Gdansk, Piotrkow (Branch Tomaszow), Przemysl, Czestochowa, Szczecin, Opole, Zamosc and Radom. All the images I looked at were images only with nothing transcribed. Admittedly, perhaps I missed some transcriptions because of my unfamiliarity with the language.
If you do read Polish, you might post a comment below telling the rest of us of any successes or failures you experience with the site.
My thanks to newsletter reader Matt Casey for telling me about this web site.