D-Bus is the established IPC on desktop Linux. The libdbus library is pretty old and not great, you'll have better luck using one of the other implementations. I can recommend a few:

- GDBus, if you're developing for GNOME

- QtDBus, if you're developing for KDE

- sd_bus, if you're writing low-level C

- zbus, if you're using Rust

For other languages, you'll want to look for bindings to one of those libraries, instead of bindings to libdbus.