LuxDraw

Lux Draw has futuristic tools that include a 'Glow Pen', a 'Hot Pen', and even 'Light Spheres'! There is also a smudge tool, as well as an ordinary pen and eraser if you prefer that.

Lux Draw supports layers in a way that's very intuitive. You simply choose whether to draw on the foreground, middle ground, or background, and that's it.

• [New Feature] Layer Opacity. To find the new slider, open the Layer Control, then press the layer's thumbnail.
• [improvement] The tracing feature, found in the Selected Color menu, now has a slider to adjust how much (if any) the selected color should tint the color that's being picked up from the layer beneath.
• [Improvement] Instead of the app refusing to add a new layer when insufficient memory, you are now asked if you want to resize the picture to make room for the new layer.
• [Other] Misc. other improvements and bug fixes.