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.
Nginx is a web server that can also be used as a reverse proxy, load balancer, mail proxy and HTTP cache.
PushPushGo is a GDPR-ready platform which enables startups, SMBs and corporations to create and send automatic web push notification campaigns on desktop and via mobile to manage various scenarios including abandoned carts, segmentation, cross-selling, customer engagement, and return rates.
reCAPTCHA is a free service from Google that helps protect websites from spam and abuse.
SnapEngage is a live chat solution that caters to businesses across various industries.
Varnish is a reverse caching proxy.