labelImg
LabelImg, an open source image annotation tool, is designed in Python with a Qt interface. It supports PASCAL VOC, YOLO, and CreateML formats, aiding machine learning through efficient image labeling. Despite LabelImg's development integration with Label Studio, it remains a fundamental tool for image annotation, available on PyPI for Python 3+. It includes features for annotation visualization, class pre-definition, and hotkey usage, and supports Docker deployments. Compatible with multiple platforms, it requires minimal setup with Python and PyQt.