I open my laptop after I arrive to the office, I start writing Python code in a Jupyter notebook. I query a PostgreSQL database, I use libraries like Pandas, Scikit-learn and Keras. Then when it’s time to productionise the code snippets I have written, I write my code using Atom or VIM and push it to AWS.
Everything in bold is Free and Open Source Software (FOSS), except for AWS. I even checked their licenses. It’s clear, FOSS has won the battle, no more evil Microsoft SQL server, no Visual Basic, nothing of these closed source softwares anymore, yay!