xCurrency - Smart Currency - A simple ads-free currency converter.
XE.com - XE.com Inc. (XE) is a Canadian online foreign exchange services company.
Flip - Currency Converter - Flip is a simple and easy-to-use currency & exchange rate converter.
Tweetbot - Sync your timeline across your iPhone, iPad, and Mac. Mute tweets by user, hashtag, tweet source, or keywords (including regex). 3rd Party support for image, video, read later, and timeline sync services.
CurrencyScoop - Developer-friendly REST API with real-time and historical currency exchange rates for world currencies and cryptocurrencies.
Currencies - An exchange rates currency converter for Android