Where to even begin with what this program does and how cool it is? You know what, I'm just going to quote directly from the site since I don't know if I could word it any better:
Lazy Nezumi Pro is a Windows app that helps you draw smooth, beautiful lines, with your mouse or pen tablet.I might also add it works great with Adobe Illustrator too. I've even tested it in Windows Paint and Irfanview!
It works with many of your favorite art programs, including Photoshop and Flash.
Why do [you] need it?But that's not all! In the last several months, some really cool things have been happening and the developer has been able to implement some additional features such as an interactive perspective drawing guide, an ellipse drawing guide, and a curve drawing guide! If you've been aching to have these features in Photoshop, please, please go try this right now! Save yourself the pain! This thing has been well worth the price I've paid and it's exciting to see what else is done with it!
- Clean line-art taking forever?
- Forced to make fast strokes to avoid seeing any jitters?
- Pressing really hard to use the full pressure range of your tablet?
- Uneven pressure in your strokes?
- Art software leaving ugly artifacts at the end of your lines?
- Hand shaking when you draw?
- App cursor getting in the way when drawing details?
- Switching software in the middle of your work because your main art program doesn't support input smoothing?
I create a few small gifs and grabbed (with permission) a bunch more from the Lazy Nezumi Pro site to share and comment on.
Scroll down for the fun!
Lazy Nezumi Pro started off as a way to create smooth lines as seen in the image below.
Along with smoother lines, came a 'pulled string' feature to add even more control when drawing lines.
Then, some fun things started to happen such as anchored constraints. The following is a constraint that creates an anchor at the last cursor down location. The next line will be constrained to draw to that location.
This one constrains all line to a point you define.
I suggested making a way to make those constrained line have a curve to them.
This is probably one of the coolest features. An interactive way to draw ellipses! Woohoo!

Then comes even more fun! A fully interactive way to plot and draw things in perspective! I might add that this feature can do 3 point, 2 point, and 1 point perspective. There is also an orthographic mode.






