2D, Two-class Classification Dataset Maker

1. Left-click to add a point of "class 0" (indicated by a circle).
2. Right-click to add a point of "class 1" (indicated by a square).
3. Click any existing point to remove it.
4. Start anew by pressing the "Clear" link.
5. Share or download the data using the respective links.

(Because sometimes you just want a synthetic dataset for testing simple classification problems without having to define the point coordinates functionally.)