Tired of having Reittiopas (the Helsinki public transportation route planner) only show you three route suggestions by default? This extension makes sure that five suggestions (the maximum possible) are always shown.
You can install it from the Chrome Web Store. [Note: This extension no longer exists]
The source code is available on GitHub: matiaskorhonen/always-five
P.S. If you haven’t already, check out Piranhas. Piranhas searches through five Amazon country-specific stores and the Book Depository to find the cheapest source for your books and does all the necessary currency conversions and shipping calculations, so you don’t have to.