Calendly is an app for scheduling appointments, meetings, and events.
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.
HTTP Strict Transport Security (HSTS) informs browsers that the site should only be accessed using HTTPS.
Rewardful is a way for SaaS companies to setup affiliate and referral programs with Stripe.
Vercel is a cloud platform for static frontends and serverless functions.
WhatsApp Business is a free to download app available on Android and iPhone using which businesses can connect with their customers.