I think that anything that accelerates the product development process would fit into this category: e.g. CAD/CAM, collaboration tools, prototyping or software development tools.<p>I accept Peter Drucker's thesis that a "firm has only two real functions, marketing and innovation, and everything else is cost," and would broaden the "make money" definition to include innovation.<p>As a side benefit many of these innovation tools also help to cut costs, although if there is unmet internal demand for a function you may actually get more usage and not affect total cost that much. Lowering the marginal cost of an activity can increase its frequency. In other words, even though the transaction cost is lowered, the total amount of time and dollars spent may stay the same or go up slightly because the firm is consuming more of it. Examples might be the amount of time spent on E-mail vs. hard copy letters, screen views vs. plots or printouts of a complex object, or daily builds of large systems with integrated regression testing vs. weekly builds two decades ago.