librsvg is a library to render SVG files using cairo.
You can download the latest as well as previous releases from here.
While there is no dedicated mailing list for librsvg, you can use the gtk-list or gtk-app-devel-list mailing lists for questions on librsvg usage. If you want to discuss the development of librsvg itself, use the desktop-devel-list.
If you have found a bug in librsvg, please report it in gitlab.