XE.com - XE.com Inc. (XE) is a Canadian online foreign exchange services company.
ConvertAll - A comprehensive unit conversion program.
Currencies - An exchange rates currency converter for Android
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.
multiConvert - multiConvert is a simple to use small sized unit converter for converting any unit into another one and getting the real time result on the main window of this program.