Hello! I'm making a fully fledged paint program similar to Adobe illustrator. What tools should I add other than these below?

- Pens -
Pen
Technical Pen
Transparency Pen
Brush
Watercolor Brush
Airbrush
Pencil
Crayon
Eraser

- Shapes - (L/R rotates the entire shape)
Circle - Shift for Oval
Rectangle - Shift for Square, Shift+L/R for Corner Diameter
Triangle - Shift between modes Right, Equilateral, Scalene, etc;
Line - Shift to toggle chaining
Polygon - Shift+L/R for # of sides
Bezier Curve - L/R for direction

- Other -
Hand - Drags canvas
Text - U/D for Font Size
Eyedropper
Lasso
Bucket
Stamp (Needs Lasso selection copied)

Well, a good one to use is Magma…you do need a account though but if you want one without sign up…use Kleki