General Ether Theory
  The paper is an introduction into General Ether Theory (GET). We start with few assumptions about an universal ``ether'' in a Newtonian space-time which fulfils   \partial_t \rho + \partial_i (\rho v^i) = 0   \partial_t (\rho v^j) + \partial_i(\rho v^i v^j + p^{ij}) = 0   For an ``effective metric'' $g_{\mu\nu}$ we derive a Lagrangian where the Einstein equivalence principle is fulfilled:   L=L_{GR}-(8\pi G)^{-1}(\Upsilon g^{00}-\Xi(g^{11}+g^{22}+g^{33}))\sqrt{-g}   We consider predictions (stable frozen stars instead of black holes, big bounce instead of big bang singularity, a dark matter term), quantization (regularization by an atomic ether, superposition of gravitational fields), related methodological questions (covariance, EPR criterion, Bohmian mechanics). 
I. Schmelzer