This document describes sustainability-orienting system design tools, including the Sustainability Design-Orienting (SDO) toolkit. The SDO toolkit is a modular software program that aims to orient system design processes toward more sustainable solutions. It provides criteria and guidelines in sustainability dimensions like environmental, socio-ethical, and economic areas. Designers can use the SDO toolkit to evaluate priorities, identify best practices, generate sustainable ideas, and check how well new concepts address sustainability. The document outlines the structure and functions of the SDO toolkit in orienting system designs towards sustainability.