ipaidabribe.com Favorite 

ipaidabribe.com is an online tool that allows the users to report when they pay bribes, are asked to pay and refuse, and when they find an honest officer.

They have a well designed site with apps for mobile phones, and although it started in India it has now grown and you can select multiple countries on different continents.

ipaidabribe.com is Janaagraha's unique initiative to tackle corruption by harnessing the collective energy of citizens. You can report on the nature, number, pattern, types, location, frequency and values of actual corrupt acts on this website. Your reports will, perhaps for the first time, provide a snapshot of bribes occurring across your city. We will use them to argue for improving governance systems and procedures, tightening law enforcement and regulation and thereby reduce the scope for corruption in obtaining services from the government. We invite you to register any recent or old bribes you have paid. Please tell us if you resisted a demand for a bribe, or did not have to pay a bribe, because of a new procedure or an honest official who helped you. We do not ask for your name or phone details, so feel free to report on the formats provided.