Show HN: I had issues organizing my favorite recipes, so I built this
I ended up building my own solution to this problem too (though mine is not open to public)The main thing I wanted to optimize was menu planning.  So I wrote a genetic algorithm which will generate a menu, add the score, mutate the menu in some way, and iterate.  In my database I have a rough price per ingredient, and my families enjoyment of the recipe (though I have kind of a lagging gradient which reduces the score per recipe to prevent duplication).  I also have included in my algorithm what I call slots.  So something like a lasagna will take 4 slots where as a stir fry will be 1 slot.  I sync my schedule and break it down to slots.  This allows the algorithm to fit the recipe to the time available.  I dont score slots though otherwise short recipes always win.Since the algorithm optimizes based on the week, but keeps a running inventory it's pretty good at maximizing my grocery bill and family enjoyment.  My average grocery bill is between $40-$60 a week.  And I cook 5 times a week.