More sheet templates for OSR systems. We have got OSE covered for B/X D&D stuff, but how about sheets for BECMI/RC (which isn't too far off, such as Dark Dungeons X) systems? Or AD&D sheet templates.
#Is there something you want available in the marketplace?
heavy ocean
heavy ocean
As for sprites and arts stuff, gritty and grimdark alternatives would be nice! I love the sprites that are already included in OMM, but I find most of them serve a brighter style while darker campaigns could use some dedicated sprites of their own. For reference, the texture pack for Minecraft known as CONQUEST fits that category very well.