Ucraft - Ucraft is a drag and drop based website builder tool.
Design Principles - An open source repository of design principles and methods
Calligraphy - Custom fonts for Android
UXmeter - Like Tinder, but for finding the hottest web design in town
Atlassian Design - Design, develop, and deliver
Dash for macOS - Dash is an API Documentation Browser and Code Snippet Manager. Dash searches offline documentation of 200+ APIs and stores snippets of code. You can also generate your own documentation sets.