The Annotate Image code from Captured.
Right now this is a stand alone app that invokes the annotate window. There is a wrapper class, Annotator, that wraps opening the nib, passing in the file and editing it in place.
Eventually this would be great as a stand alone framework, but the project has not been re-worked to support that. The plan is to support distribution via Carthage, but that is complicated by the fact that this contains resources such as images and nib files.
This code is distributed under the MIT License. See LICENSE.md for details.