I know the Django framework very well and have created many sites using it, but lately, I try to avoid working with it.
Instead of Django, I have more recently been using Werkzeug, Jinja2 and WTForms.
I work with the following databases: MySQL, PostgreSQL, MongoDB, SQLite. SQLite I most commonly use in desktop applications. MySQL - when a customer insists on this being used. The others - depending on the tasks.
Also I like to develop software for the desktop. To do this, I use GTK+ and Qt.
For source code version control I use Git and before that Bazzar.
The operating system I use is Linux on all my computers and servers.
My favorite web server is nginx. I know how to tune it very well.