ConvertAll - A comprehensive unit conversion program.
XE.com - XE.com Inc. (XE) is a Canadian online foreign exchange services company.
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.
Currencies - An exchange rates currency converter for Android
Convert for Windows - Convert is a free and easy to use unit conversion program that will convert the most popular units...
Yahoo! Finance - Currencies Center - Currency Converter from Yahoo! Finance.