Annotate Screen - Browser based annotation tool.
Annotate - Annotate (formerly know as Glui) is the simplest way to capture, annotate and share screenshots.
Annotable - Ultimate image annotation & markup tool
Predictly.co - Save time and resources with our state of the art human-in-loop Data annotation platform services to build your solution specific AI solutions. We help you with the data heavy lifting while your data scientists focus on business centric solutions.
Snap Markup - Tool for photo marking and annotating images.
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.