Drupal is a free and open-source web content management framework.
GiveCampus is a fundraising platform for nonprofit educational institutions.
Google Tag Manager is a tag management system (TMS) that allows you to quickly and easily update measurement codes and related code fragments collectively known as tags on your website or mobile app.
Salesforce Service Cloud is a customer relationship management (CRM) platform for customer service and support.
Varnish is a reverse caching proxy.