Like a lot of people, I'm a big fan of Jeff "Beachbum" Berry's Grog Log and Intoxia books, which are, hands down, the best drink recipe books money can buy for authentic- and delicious-tasting tiki drinks. But when it comes time to play bartender, I often find myself flipping through the books for an hour looking for a recipe that uses liquors I actually have on hand.
Grogalizer is a website that makes solving this dilemma easy. You simply click on what you currently have from a list of all of the ingredients featured in the books' recipes, and the Grogalizer responds with the names and page numbers of the drinks you can make. Brilliant!