I’ve been messing around with it for the first time… props to whoever thought it up.
The quick answer. Nicholas Bishop creator of Sharp Construct.
http://sharp3d.sourceforge.net/mediawiki/index.php/Main_Page
Nicholas came up with Blender’s implementation, which is a tremendous task in itself, however the idea of pushing and pulling vertices on a mesh with the mouse has been around for quite a long time (Amapi, Maya artisan, etc).
I think cavemen thought of sculpt mode first…
well God if you want to be technical
bahahaha. this made my day.