I agree with these jim42 suggestions:
[GDM] (Perhaps a more informative tag for this one; "Article", maybe?)
[In progress] (For projects that are actually in production, as proven by screenshots, but don't yet have a demo)
[RSE/FRLG graphics] (I see no reason to differentiate between these; the stylistic difference is minimal)
There is actually a HUGE difference between graphic styles from R/S/E and FR/LG
most of which being the overworlds.