The Ruby Gem for Bittrex is a library for interfacing the Bittrex API with an existing Ruby application. The library is open source, however, the Bittrex API requires an API key for use. The library is not officially owned by Bittrex, though it's usage is endorsed by Bittrex on their API documentation page.
Getting from A to B in the most cost effective way can be difficult if you're just guessing as you go. TaxiMe is an application that provides users with cost estimates for cab fares and trip information for major cities in the U.S. and Canada. This means users can plan their journeys beforehand and know exactly what the costs involved will amount to. TaxiMe's API allows access to cab contacts and rates for these different cities.