The environmental thermostat may influence the quantum dynamics of many quantum samples. Particularly, certain quantum states relevant to quantum technologies are sensitive to surrounding thermal reservoir. We will show how to obtain non-classical correlations in artificial or real atomic samples as well as nano-mechanical or optical systems when interacting also with the environmental thermal reservoir [1,2]. Particularly, the electromagnetic field generated by a collection of few-level qubits in a thermal environment surprisingly exhibits quantum features. Furthermore, when a collection of cooperatively interacting qubits are fixed on a nano-mechanical resonator then its fast dynamics is transferred to the resonator’s ones. The oscillation amplitude is enhanced as well due to the cooperative interaction nature. Finally, cooling effects in various nonlinear systems will be discussed as well. The quantum dissipations are included, taking into account the nonlinearity of the qubit–oscillator interaction. For certain bath temperatures and resonator’s quality factors, effective cooling occurs. As the photon-photon second-order coherence function behaves differently depending on photon number states parity, we describe a mechanism distinguishing those states.