For beer, I really like your calculator but already had BeerSmith so just continue to use it. I want to be a paid customer for you, but can't because of the poor support for wine . (Check out VinoTrac for example).

+ Add wine yeasts / cider yeasts (there is another feature req out there for that).
+ Remove some "required" fields from the beer recipe, make them optional (Boil time for example).
+ Add more fermentables, like different grape varieties

It still would not be perfect, but a data admin can add yeasts and fermentables without a software change, and I could use it for wine (and start using it for all my beer recipes).

 

I guess my goal isn't the recipe calculation as much as it is the recipe tracking for wine. I keep detailed notes on the wines I make, but do it is different places (namely a notebook). Adding wine yeasts to the database would be awesome. It would help keep all fermenting related logs/recipes/notes in a single place.
The custom yeast is what I can use for now.

Thought:
You have a "My Inventory" section; this area allows me to add custom yeasts/fermentables/hops/etc just like on the recipe builder. Would it be possible to add any custom items in "My Inventory" to the related dropdown on the recipe builder? That way a "custom" fermentables/yeasts/etc would show up and we could select them from the dropdown as if it was any other item. This feature would help beer brewers with custom items, and a side-effect is that it would make it easier to store custom fermentables for wine recipes .

Personal question: How do you currently store your wine logs? Different software?