Our own original engineering and product design tools, built because no equivalent existed, or at least none that we could find. They include scorecards, a design review tree, a persona card creator and a features prioritizer.
These are our own tools, such as engineer skill scorecards for mechanical, electronic and software roles, design review decision trees and user persona makers. They also include feature prioritization matrices, LaTeX formula editors, scientific publication search and proxy list tools. Engineering chat rooms, royalty free image repositories and other small utilities built for engineers and product developers complete the set.