SUMO Paint
This is a pretty slick photoshop alternative done in flex. Impressed with what it does, but the performance at which it does it rocks! This app does a good job in showing off what Flex can do if used properly. Would be nice to see this ported as an AIR app.
I’ve played around with this and it compares to any of the photoshop alternatives out there like Photoshop Elements, Slashiup and the such. Maybe one day when I have time I’ll write something like this.