Librsvg is a library to render SVG files using cairo as a rendering engine. For example, you can render SVG to in-memory RGBA surfaces, or to PDF streams.
Trivia: rsvg stands for "Resplendent SVG".
You can download the latest as well as previous releases from https://download.gnome.org/sources/librsvg.
You can ask questions about using librsvg in the Platform category in discourse.gnome.org.
For real-time chat you can go to irc.gnome.org and the #gnome-hackers channel, or chat.gnome.org in the #general channel.
You can also ask questions or report bugs in gitlab.gnome.org.
Be sure to read the CONTRIBUTING.md document.