As the name implies, My Burrito Finder, well, finds you a burrito. Visit the site, let it pull your location (or type in a postcode yourself) and let the site do its job. You'll get pins on a Google Map that indicate how far your future lunch is from you, along with a sidebar packed with reviews and more information.
The webapp is powered by Yelp, so any restaurant near you that has burritos on the menu — or at least is known for its burritos — will show up in the list. In my case, the service turned up about twenty different places, many of which were some of the best burrito spots in town, so that's a point in its favour. The only downside is that because the data is from Yelp, you'll really want to click those links in the sidebar to check out the reviews before you stroll out for lunch — you might find a gem, or the best burritos in town, or you might just find a spot that has a burrito you can order, which is a little less inspiring.
In any event, if you want to give it a shot and see what you can find for lunch, hit the link below.