SVG charts by default. Work directly with the points and marks so you can get low level, but still support labels, focus, tooltips, responsiveness. Compiles strict TypeScript. Completely customizable. D3-compatible. Lightweight (32kB) relative to other charting libraries.
What we don't like
Specific “grammar of graphics” approach which delegates layout and rendering to the runtime. This results in superior charts, but is a particular approach you need to adopt.
Framework for developing web, mobile, desktop apps using Python. Allows you to use Python libraries across platforms. Supports hot reload. Build command for publishing on web, iOS, Android, macOS, Linux, Windows. Handles auto update, storage, auth, accessibility.
What we don't like
Great for developers, but lacks a native feel for users of each platform.