HTMLEmail.io - Responsive HTML email templates for startups & developers
The Jackbox Party Pack 2 - Five new party games that can be played using mobile devices
Templates by Email Monster - Hundreds of free, responsive email templates. Pick and edit.
GNOME Mines - Open source minesweeper game for the GNOME desktop.
MJML - The open source framework for responsive emails
Werewolf Receipt - Instantly print and play games using a receipt printer