Our minimalist, responsive design is provided by the Bootstrap framework.
The website runs on Apache HTTP Server on Ubuntu Linux. We use the Varnish HTTP accelerator and Pound for HTTPS (TSL/SSL) termination. We primarily use DigitalOcean and Netkine for hosting, with occasional use of Amazon Web Services (primarily SES for weekly emails and S3 for backups). Static pages are generated with GNU make and scheduled by Vixie Cron.
Our Help pages and news archives are powered by WordPress.
Hebcal.com primarily uses Helvetica Neue for body and headers. Helvetica Neue is the default font for Bootstrap
Hebrew body and headline text is Alef Hebrew.