MONAI Label is an intelligent image labeling and learning tool that uses AI assistance to reduce the time and effort of annotating new datasets. By utilizing user interactions, MONAI Label trains an AI model for a specific task and continuously learns and updates that model as it receives additional annotated images.

MONAI Label provides multiple sample applications that include state-of-the-art interactive segmentation approaches like DeepGrow and DeepEdit. These sample applications are ready to use out of the box and let you quickly get started on annotating with minimal effort. Developers can also build their own MONAI Label applications with creative algorithms.
(from monai.io/label.html)