Software architecture tools
The best free and paid software architecture diagramming and design tools
Penpot
The open-source solution for design and prototyping
Architectural Decision Records
Homepage of the ADR GitHub organization
Stencil
A powerful toolchain for building Progressive Web Apps and Design Systems
Colour Safe
Colour Safe is a tool to explore beautiful, accessible color palettes for your website based on Web Content Accessibility Guidelines (WCAG).
HTML5 UP
Responsive HTML5 and CSS3 site templates designed by @ajlkn and released under the Creative Commons license.