The nonlinear propagation of high-intensity laser pulses above a critical peak power is characterized by a self-guiding behaviour called filamentation. Laser filaments are self-sustaining light structures with steady core diameters that can span lengths larger than their Rayleigh length by orders of magnitude. If the laser pulse peak power is of sufficient magnitude, higher-order nonlinear effects, like plasma formation via multi-photon ionization, can occur due to the collapse of the laser beam driven by self-focusing. A variety of applications for laser filamentation have been found, but so far, the field has been limited by the available laser systems used for driving the process. While high average power, intensity or repetition rates could be achieved, one could never achieve all three simultaneously. Our research focuses on this unexplored region of laser filamentation, using femtosecond pulses at high pulse energies and repetition rates. To this end, our group has a variety of different laser systems available, from high-power NIR systems to high-intensity SWIR systems. Subjects of investigation include fundamental studies, both experimental and simulation, on the plasma filament-induced hydrodynamics in air, cumulative effects resulting from them and their effect on the filamentation process itself, as well as, studies on triggering electrical discharge via plasma filaments, filament-based optoacoustic aerosol clearing for the enhancement of free-space optical telecommunication, coherent plasma-chemistry and plasma-based THz sources.