1. BrushViewQL
   If you happen to have a folder filled to the brim with .abr files this plugin is a godsend. It still annoys me to no end that Photoshop/Bridge doesn’t have some way to preview brush files — at least that I’m aware of. This plugin bridges the gap! Yay!
2. EPSQuickLookPlugin and one for Illustrator docs
   The second and third are related and for previewing EPS’s and AI’s. Definitely nice to not have to sift through Bridge to preview those. Ahh …

Ahhh, now to go discover what’s in some of the many mysterious brush files.