XE.com - XE.com Inc. (XE) is a Canadian online foreign exchange services company.
Calvertr - Online smart calculator and unit converter to convert various units of measurement with tip calculator. It is the most powerful iOS 8 and iPhone 6 & 6 Plus compatible with the clean interface.
Yahoo! Finance - Currencies Center - Currency Converter from Yahoo! Finance.
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.
Elk - The fastest way to convert currencies on mobile.
Currencies - An exchange rates currency converter for Android