De Bellis Napoleonics, DBN, is a terrific game. It is produced by KISR Productions and available from their site at DBN Wargaming. It is a stand alone game, developed from De Bellis Antiquitatis, that allows for us to quickly fight Napoleonic battles.
I hear ya, you purists out there, wargaming sacrilege. But the simple truth is that this is a good and fun game that allows me to actually play with my Napoleonic miniatures! An extra strength of the game is the excellent "large battle DBN" aspect. DBA/DBN have some simple yet elegant mechanisms - some of which have not been matched by other rule sets - for command and control. DBN takes it a little further with some fine optional rules allowing for better (or worse) generals.
I can still play Black Powder with the miniatures owing to the forgiving figure-basing notions in that also excellent game.
Pictured below is a representative French army for the 1809 campaign in Austria. The various elements are described in the image, but what is nice is that only 8 of the elements are compulsory, allowing a player to then complete the army to suit his likes.
This is only a fraction of the French (and allies - Bavarian, Italian, Saxon) that reside in the combined collection of my brother and I (which, luckily for me, lives at my house!). We have a ton of Austrians too.