Today’s featured promo on MacUpdate offers Graph Sketcher 1.4.8 for US$14.95 (50% off, retail $30). “Graph Sketcher lets you make elegant and precise graphs in seconds, simply by sketching what you want. The interface is intuitive and simple so that you can quickly find what you want while underground algorithms take care of all the messy details. It’s no problem if your data is already in a spreadsheet or database program — just copy and paste it right into Graph Sketcher. All adjustments you make are displayed in real time, so fine-tuning is a piece of cake.” Graph Sketcher 1.4.8 requires Mac OS X 10.3.9 or later.