With the Betfair Ruby SDK by Luke Byrne, users can create betting robots to gamble online. It allows to generate several betting and trading scenarios using a bot file that contains all the logic. To run the bot, developers can create a daemon file with username, password, exchange_id, countries_array, and amount to bet. More than one bot can run using the same bot file. To be more informed, the API provides the features of market information, current bet details, and account statements.
There's no doubt that Wikipedia is a giant store of information. And yes, they have an API, but the data isn't exactly structured. But that didn't stop Jim Blackler, who created Quizipedia, a fun game based off of Wikipedia entries.