On tonight’s astro-ph, it looks as though a new software package has been announced (twice, it seems) that will do basic image-prep, de-Bayering, and basic differential photometry:
Tools for High Precision Photometry from Wide-Field Color Images
AutoWISP: Automated Processing of Wide-Field Color Images
Perusing the papers, particularly AstroWISP, reveals the target audience are citizen scientists using DSLR cameras for photometry.
The software seems to be accessible only via Python commands. There is no mention of a GUI unless I’ve missed something. Drilling down into the documentation reveals many lists of such commands.
If this is how the software is operated most citizen scientists as I understand the term (amateur astronomers like me who don’t speak Python) would be unable to use it.