ProFlow adds floaters to objects in Blender, covering welds, custom assets, moldings and similar details. The workflow follows three steps: choose an asset from the library, select the object you want to place it on, then pick the tool you'll use.
Beyond placement, ProFlow can add assets at the intersection of several objects and set up assets for predictable results. You can replace assets with others from the library or the scene, cut an asset with the Cut tool, and extract edges from objects to use them. It also lets you create your own assets and add them to the Asset Management, use assets from your scene, and create and use collection instances, along with transfer assets and conversion with random values.
The add-on ships as a single Blender script bundled with a set of assets, and it's released under the GPL license. Installation runs through Blender's add-on preferences using Install from Files, after which ProFlow lives in the Property panel opened with the N key in the 3D view. A demo video is available for a closer look.