So a couple of things I forgot to mention a few things that I think would definitely be helpful (some of which I use pretty extensively when prepping). They are all in print/digital form but would translate into some fantastic tables that help flesh things out when putting an adventure together.
- Your Whispering Homonculus by Kobold Press/Richard Pett. This contains numerous tables that cover a ton of different subjects. There are two books out of these but Kobold Press also features them regularly on their blog on their website. Here is an example: Your Whispering Homunculus: Obscure Symbols and Portents, Part 1.
- All the fantastic resources by Raging Swan Press. Originally geared for Pathfinder, but they now offer System Neutral and 5e stuff. However, their free resources are all pretty neutral and are excellent. They also have a village backdrop line that comes in free & paid (more in-depth) that are great. I back their patreon and get some excellent material from it. Example: https://www.ragingswan.com/free-resources/
- There was also a recent Kickstarter from a small publisher called Limitless Adventures. They routinely put out small PDF supplements monthly for things like encounters, locations, etc. I just received the Kickstarter rewards for their Limitless Encounters campaign and it is well done. Something like this would also be great. https://www.limitless-adventures.com/.
These types of things that could be used to add flavor and color would be excellent. Additionally, it might be possible to work with these small publishers to get their content added to Fantasy Grounds and for sale via DMsG, RPGNow, FG Store, etc.