D3.js - D3.js is a JavaScript library for manipulating documents based on data. D3 helps you bring data to life using HTML, SVG, and CSS.
Fathom Analytics - Simple, trustworthy website analytics (finally)
Chart.js - Easy, object oriented client side graphs for designers and developers.
Plausible.io - Plausible Analytics is a simple, open-source, lightweight (< 1 KB) and privacy-friendly web analytics alternative to Google Analytics. Made and hosted in the EU, powered by European-owned cloud infrastructure 🇪🇺
Google Charts - Interactive charts for browsers and mobile devices.
Klipfolio - Klipfolio is an online dashboard platform for building powerful real-time business dashboards for your team or your clients.