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.
ConvertAll - A comprehensive unit conversion program.
XE.com - XE.com Inc. (XE) is a Canadian online foreign exchange services company.
Elk - The fastest way to convert currencies on mobile.
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.
Yahoo! Finance - Currencies Center - Currency Converter from Yahoo! Finance.