The 3rd beta of what will become Carla 2.0 has been released.

New features implemented since beta2 include -

Internal patchbay mode

Carla as VST plugin (Linux only)

Carla LMMS plugin

New and updated skins

Old non-skin mode

If you're using the KXStudio repositories, you can simply install "carla-git" to get the latest beta.