In celebration of Expresii being showcased at SIGGRAPH 2017 Appy Hour, Expresii is now on Sale til 4 Aug 2017:
30-sec quick demo video:
For more information on the sale, see: http://www.expresii.com/blog/siggraph-2017-appy-hour-expresii-25-sale
Expresii features several innovations (3D brush done right; most organic water-based paint sim; hybrid raster-vector rendering and more) not found in all other painting apps.
You can read Expresii’s abstract for SIGGRAPH Appy Hour here:
Thanks Strob!
I was invited to talk about Expresii in the SIGGRAPH 2017 Spotlight podcast:
https://www.facebook.com/SIGGRAPHConferences/posts/10156562684042516
and people wonder why it took over 10 years to get the app out. Looking at what I posted here 10 years ago:
http://forums.cgsociety.org/showthread.php?t=474684
http://forums.cgsociety.org/showthread.php?p=4190819
It’s been a long journey. At first Adobe licensed our MoXi tech back in 2006, but they failed to make good use of it (if you are interested you can read my story with Adobe).
Anyway, we continue to improve the simulation technique and Expresii should be the first hybrid-vector-raster paint program out there. I hope you like this Expresii made available to you.
Thank you.
Thanks to all those who came!
Expresii runs on Windows and that’s actually a Surface Pro that we were using but some thought Expresii was an iPad app! 
BTW, we still have the sales going for some hours more til mid-night of 4 Aug Pacific Standard Time!
I want to say thanks for making this software. It is incredible. I remember your posts from 10 years ago and being impressed then but forgot about it. I bought a copy of it after seeing this thread. My 4yr old daughter loves water color and absolutely loves expressii, enough ask for it and to paint in it for more than an hour at a time. The quality of the painting engine really makes the other digital painting programs look old, really old now. I hope to see this program and the technology grow.
Thanks boombay_potato!
I should put the squirrel animation here, Click below the see it animated:
And this TED animation is just out:
Checkout the Expresii water effects used in this video!