Really Good Emails - A large collection of good product email design.

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.

Good Email Copy - Email copy from great companies.

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

Good Sales Emails - Best sales emails from great companies

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.