Amazon Mechanical Turk - The online market place for work.

Annotate - Annotate (formerly know as Glui) is the simplest way to capture, annotate and share screenshots.

Supervisely - Supervisely helps people with and without machine learning expertise to create state-of-the-art...

Glui - glui - GLUI is a GLUT-based C++ user interface library which provides controls such as buttons, checkboxes, radio buttons, and spinners to OpenGL applications. It is window-system independent, using GLUT or FreeGLUT.

Labelbox - Build computer vision products for the real world

Datatang.ai - Datatang provides off-the-shelf AI training datasets, on-demand data collection & annotation solutions that power the world's most innovative artificial intelligence.