Open-source libraries
SimPEG: Simulation and Parameter Estimation in Geophysics, an open source python package for simulation and gradient based parameter estimation in geophysical applications. GitHub.
Stride: an open-source library for ultrasound modelling and tomography that provides flexibility and scalability together with production-grade performance.
My favorite tutorials
Ph.D. Advice by Prof. H.T. Kung, Harvard University.
The Science of Scientific Writing by Prof. George D. Gopen and Judith A. Swan, Duke University.
Inversion for applied geophysics: A tutorial by Prof. Douglas W. Oldenburg and Yaoguo Li, University of British Columbia and Colorado School of Mines.
Lecture Notes on Inverse Theory by Prof. Andreas Fichtner, ETH Zurich.