Developed Software Packages:

1. 3D (an)elastic adjoint tomography based upon SEM, adjoint methods and full Hessian kernels.
2. 2D (an)elastic adjoint tomography based upon SEM, adjoint methods and full Hessian kernels.

1. Efficient construction of 3D full Hessian kernels on the fly based upon SEM and second-order adjoint state methods.
2. An efficient 3D full-waveform inversion (FWI) workflow based upon Cray PBS submission on the HPC Archer, UK (self-used).
3. SEM_VIEW2D3D: A flexible package for processing and visualizing 2D and 3D wavefields, kernels, and models based upon spectral-element and adjoint methods (self-used).

1. SPECFEM3D: improving the internal mesher for fluid/solid modeling with external models (manually set up the internal mesher for complex model).
2. SEM-FK (2D): coupling acoustic/elastic full waveform modeling along fluid/solid boundary, where the elastic case is provided by Ping Tong.
3. Multi-SEM: multiple spectral-element and adjoint methods for computational seismology [elastic version]. 

1.     3-D visco-elastic full waveform modeling and inversion (OpenMPI/C++, based on IFOS3D)
2.     3-D wavefront tomography (OpenMPI/C++, based 3D NIP-wave tomography (WIT))
3.     3-D kinematic and dynamic ray tracing (OpenMPI/C++, based on 3D NIP-wave tomography (WIT))
4.     5-D interpolation and regularization (OpenMPI/C++, CRS-based and Rank-reduction-based, the CRS interpolation is based on 3D partial CRS(WIT))
5.    3-D common-reflection-surface (CRS) with global optimization (OpenMPI/C++) v1 (for WIT members, or see here), v2 (for Hamburg seismics group)

Other codes not developed by myself but familiar with the codes:

1. Large-scale seismic inversion framework (LASIF). By Krischer et al.
2. SeisFlows—Flexible waveform inversion software. By Ryan T.Modrak et al.
3. SES3D: Spectral-element wave propagation. By Gokhberg and Fichtner.
4. AxiSEM: broadband 3-D seismic wavefields in axisymmetric media. By T. Nissen-Meyer et al.
5. ObsPy: A Python Toolbox for Seismology. By Moritz Beyreuther et al.
6. 3-D elastic full waveform inversion (FWI) (OpenMPI/C++). By Thomas Bohlen et al.
7. 3-D finite-difference modeling and version (OpenMPI/C++). By Thomas Bohlen et al.
8.  Correlation-based source location methods and diffraction stacking (Matlab). By Lei Li et al.
9.  Rank-reduction 3-D seismic data denoising and reconstruction (Matlab). By Y. Chen et al.
10. 3-D seismic time migration with CRS method (OpenMPI/C++). (WIT, Germany). By WIT team. 
11.  3-D seismic diffraction separation and imaging (OpenMPI/C++). (WIT, Germany). By WIT team.
12.  Specfem2D/3D. CIG
13. ......