XE.com - XE.com Inc. (XE) is a Canadian online foreign exchange services company.
ConvertAll - A comprehensive unit conversion program.
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.
Yahoo! Finance - Currencies Center - Currency Converter from Yahoo! Finance.
Converter NOW - A simple, immediate and fast unit converter!
Currencies - An exchange rates currency converter for Android