This application is reason enough to choose an iPhone over its competitors. Over 1500 recipes in your pocket, from printed sources, with the sources cited, and variant recipes ordered by year (with age nicely indicated by the background color).
Cocktails is from the fine folks who brought us cocktaildb.com and takes that prodigious work in the direction it has been needing to go in order to be considered an authoritative reference.
If they had just taken their database and added the origin of each recipe, this application would definitely be worth $10, but they brought the design and functionality to a level far above the cocktaildb.com we're all familiar with and, indeed, above the average iPhone app.
If this is 1.0, we can't wait to see where they go with it next.
Key features: multiple ways to search (recipe name, ingredient, type, flavor, and a relatively small number of tags such as "apertif" or "egg"), the ability to mark favorites (which can then be searched separately), an elegant navigation mechanism, and a beautiful look & feel.
This would be great enough, but they've also added two ideal export functions which couldn't be better chosen: email this recipe and Twitter about this recipe.
If we'd been asked to describe our ideal cocktail-related application, they'd probably have hit in this initial release 80% of what would be on our high-priority list.
Recommended. You can get Cocktails for iPhone in the iTunes store. View a demo here.
(Screenshot borrowed from Jamie Boudreau who also praised this application highly).