I code mostly in C++ and have some experience with Python, matlab, and several other application-specific languages. I have added significant components to the following collaboration packages:
AraRoot - the ARA collaboration's data processing and low-level analysis package
AraSim - the ARA collaboration's official monte carlo simulation package
icemc - the ANITA collaboration's official monte carlo simulation package
AraSimQC - a set of scripts that monitor and run the ARA simulation to track changes in the code
icemcQC - a set of scripts that monitor and run ANITA's icemc simulation to track changes in the code