Dude! I would love to get my hands on this for all things useful in HARPSF!
After having played several more "narrative" games, as they tend to be called by their fans (funny, I thought all these games were about narratives ...), I have come to really appreciate cards for NPCs in particular, but also - in some games - for talents/feats/abilities.
We made some very simplified weapon slips in our game, basically a place to write down your weapon stat lines, and your own skill number for different types of actions, with their different weapons. So, instead of calculating (and remembering) all the various numbers, you just wrote it down for each weapon and the combat action used the most.
A combination of these cards, and action cards...
I love them. ICE should sell them on DTRPG, both as PDFs and as printed cards. This is just essential for a lot of gamers. The level of math-hatred in this hobby is ludicrous, but you can't change the world, you have to adapt to it ... and that way it will adapt to you... or something.