For websites and internal web applications I use the following.

Framework:

- A bastardized modification of Django (bad choice, but I'm stuck with it). I'd really like to try Pyramid or Flask.

- Mako for templating.

Databases:

- PostgreSQL for primary data storage.

- Solr for full-text search.

- Redis for cached data.

Servers:

- Nginx for the front-end server.

- uWSGI for the application server (bridge between Nginx and Django). I'd like to try Nginx Unit.

Browser-side:

- jQuery for functionality.

- Bootstrap for base styles.