Nevercenter has released CameraBag 2 a standalone image editor and special effects application available in versions for Windows and Mac. 

CameraBag 2 includes standard image processing tools such as cropping, color correction, and a curves editor as well as more than 100 styles and effects filters. Effects and edits are non-destructive and can be layered and rearranged.

A 30-day trial version of CameraBag 2 can be downloaded from the Nevercenter web site. A cross-platform license is available now for an introductory price of US$24; regular price is US$29. A Mac only version is available from the Mac App Store for an introductory price of US$19; regular price is US$24.