OmniGraphSketcher
www.omnigroup.com/omnigraphsketcher
From the page
Saved with the link. Notes from 2007 to 2016 are mostly the page's own words, so this is probably an excerpt.
New $30 graphing program from the Omni Group; includes terrific drawing tools and looks like a great alternative to the graphics features in Excel and Numbers (which are heavily skewed toward the dopey features where pretty 3D charts are derived from two-dimensional data). Watch the demo movie and prepare to be impressed.