In this paper we have presented two applications of Momentum Transfer Theory (MTT), which were both aimed at obtaining reliable data for modeling of non‐equilibrium plasma. Transport properties of ion swarms in presence of Resonant Charge Transfer (RCT) collisions are studied using Momentum Transfer Theory (MTT). Using the developed MTT we tested a previously available anisotropic set of cross‐sections for Ar++Ar collisions bay making the comparisons with the available data for the transverse diffusion coefficient. We also developed an anisotropic set of Ne++Ne integral cross‐sections based on the available data for mobility, longitudinal and transverse diffusion. Anisotropic sets of cross‐sections are needed for Monte Carlo simulations of ion transport and plasma models. Application of Blanc’s Law for drift velocities of electrons and ions in gas mixtures at arbitrary reduced electric field strenghtsE/n0was studied theoretically and by numerical examples. Corrections for Blanc’s Law that include effects of inelastic collisions were derived. In addition we have derived the common mean energy procedure that was proposed by Chiflikian in a general case both for ions and electrons. Both corrected commonE/n0and common mean energy procedures provide excellent results even for electrons at moderateE/n0where application of Blanc’s Law was regarded as impossible. In mixtures of two gases that have negative differential conductivity (NDC) even when neither of the two pure gases show NDC the Blanc’s Law procedure was able to give excellent predictions. © 2004 American Institute of Physics