Maya Curve Correction Tool is a cool little Python script freely distributed from its author zoharl. Maya Curve Correction Tool will allow you to draw curves more intuitively similar to the way that curves are drawn in Adobe Illustrator where the Curve Correction Tool for Maya will automatically attach, correct, and open and close curves as you draw.
Download the Maya Curve Correction Tool script here curve_correction.py Find a shelf icon here: curve_correction.bmp