Do not forget: https://www.amanithvg.com (I'm one of the authors, 20+ years of active development). Full OpenVG 1.1 API, CPU only, cross-platform and analytical coverage antialiasing (rendering quality) as main feature. The rasterizer is really fast. I swear ;) At Mazatech we are working to a new GPU backend just these days.

AmanithVG is the library on which our SVG renderer: https://www.amanithsvg.com is based. All closed source as now, but things may change in future.

I will do some benchmarks of the current (and next, when the new GPU backend will be ready) version of our libraries against other libraries. Do you know if there are any standard tests (besides the classic post script Tiger)? Maybe we can all agree on a common test set for all vector graphics libs bechmarks?