perfect first layer – interesting talk by trio of 3D printing nerds, mostly organized in Q&A form around questions sent from audience. good knowledge base.
wojna wedługo Wołoszańskiego (PL only) – interesting historical podcast (by one of the most famous PL historians), centered around world war I, II, and cold war era events.
świat w trzy minuty (PL only) – a few minutes long episodes on random, popular science topics.
cpp.chat – very nice podcast about C++. unfortunately not active recently, though there are still quite a few historical episodes for you to listen to.
hackable? – high-level overview of security issues in different places and organizations.
darknet diaries – a bit more in-depth podcast about CyberSec, cyber threads and stories from hacking world.