Inkscape

All

| - / = | Zoom in/out | 3 / 4 | Zoom to selection / drawing | 5 / 6 | Zoom to page / page width {: .-shortcuts}

Select tool (F1)

| [ ] | Rotate {: .-shortcuts}

Edit path (F2)

| Ctrl | constraint {: .-shortcuts}

Dragging an anchor handle

| Ctrl | snap to 15 degrees | Alt | ? {: .-shortcuts}

Bezier (Shift F6)