StickyBrain

StickyBrain has been described as "Stickies on steroids".

Unlike Stickies, StickyBrain most prominently allows for a categorizable browser. It also possesses a number of other features.

The 2.0 version, despite not having all of the features of 3.0+, did have some less obtrusive palettes (such as for formatting) which are not present in 3.0+.