cardmaker VS ServiceStack

No it's not, altho if that's what you're looking for I'll gladly recommend CardMaker over on github. It has the graphical interface you're likely looking for

In addition to nandeck, a quick google search also turned up component.studio and cardmaker.

Digital origin physical? For creating large sets of printable cards I'd recommend nandeck and Cardmaker. I've only used the former, but Cardmaker also looks really good.

We also named our tables after some of our favorite board games (which also didn’t have too weird or awkward names). And for fun, we put most of the vegetarians at the Point Salad table 😁. It was great to hear that a few people actually bought the game of their table! I designed the signs for each table using CardMaker and images from BGG.

This was made using CardMaker, so you'll need to setup that software to make modifications: https://github.com/nhmkdev/cardmaker

Prototype - Now I'll figure out how to get that new content into paper form. At this point I'm usually using a combination of Cardmaker (some people prefer Nandeck or Indesign... or others) and google drawings (which handles basic boards/player sheets pretty well). Cardmaker is a topic unto itself, but you can make some serviceable prototype cards on it relatively quickly. My goal here is to spend the least amount of time making a prototype, while it still being a reasonable facsimile of what the game is trying to be. Keep in mind playtesting will often reveal flaws or improvements which make the previous version obsolete. Only put in as much time/effort into the prototype as you are comfortable throwing into the trash afterwards. As your game develops, some systems may stabilize (and not require revisions), at that point you can put a little more effort into making it nice.

I can't recommend Card Maker enough. I love this little program to pieces. You feed it a css file (which Excel can export as) and then it uses that data to populate a template you design. You can make really rudimentary cards really easily, and as your needs grow you can learn how to do stuff over time in the program.

CardMaker (https://github.com/nhmkdev/cardmaker) as usual does all the things NanDeck does but with a usable UI.

If you learn how to use CardMaker, even generating the final card image for use in Foundry will be a cinch!

Are there any graphic designers out there who have used the free open source CardMaker software from https://github.com/nhmkdev/cardmaker

That's a bit handwavy, which of the major ServiceStack features listed on https://servicestack.net homepage does masstransit do? Ok if you just need what's in masstransit & aren't to up to speed with ServiceStack's latest featureset, but to suggest no-one else would find any of its productive features useful is unnecessarily dismissive.

Not sure if it's exactly what you are looking for but all of the things you mention are features of ServiceStack https://servicestack.net/