Odoo Point of Sale - Odoo is an online point of sale solution for retail and restaurants.
Materia - Materia is a development environment to build advanced mobile and web applications.
Lightspeed - retail and restaurant point-of-sale, ecommerce, and omnichannel solution
adapta-gtk-theme - An adaptive Gtk+ theme based on Material Design Guidelines - adapta-project/adapta-gtk-theme
Fat Zebra - Online Payments Made Simple
Zukitwo - Zukitwo is a Gnome Shell and GTK theme that currently works on Gnome Shell 3.14 and the latest version of GTK.