Modeling
Gurobi (Python), it supports other languages as well.
Data analysis
Text editing
Programming IDE’s and building executables of codes to be sent to the company
PyCharm (python), can be registered with bilkent e-mail addresses for full version.
PyInstaller post on stackoverflow, for building executables of python codes, requires pycharm but you can check out PyInstaller package if you want to do it via command line.
IntelliJ IDEA (java), can be registered with bilkent e-mail addresses for full version.
IntelliJ compiling and building guide, post on stackoverflow, java is a bit more cumbersome, you may need solutions other than these if you are using JavaFX.
Others
Fork (collaborative coding)