I can do many interesting things with a mixture of Cyberduck, TextMate, Navicat, and ssh.
Project management – phabricator.
I use XCode and AppCode for my iOS code.
For Android, I use Android Studio and develop on Nexus devices.
Continuous integration: jenkins.
Chat – slack.
Web frameworks – node, D3.js, elixir.
Data frameworks – numpy, pandas, spark.
Notebooks – jupyter, rstudio, pycharm.
Machine learning – scikit, keras, tensorflow, pytorch, fastai.
mail – google apps.
dns – google domains.
cloud – firebase, gcp, aws, do.
databases – SQLite, postgres, realm.
analytics – amplitude, bigquery.
mobile sdks – fabric, branch, instabug.
mobile push – onesignal, clevertap.