Today’s featured promo on MacUpdate offers Lineform for US$49.95 (38% off, retail $79.95). “Lineform (formerly Inform) is a completely new drawing program. Winner of a 2006 Apple Design Award, it is the ideal tool for vector based diagrams and illustrations. Powerful features combine with a simple interface to create an intuitive artistic process.” Lineform requires Mac OS X 10.3.9 or later.