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.
Unit Converter - It's More easy to covert the UNITS now with the APP
XE.com - XE.com Inc. (XE) is a Canadian online foreign exchange services company.
Elk - The fastest way to convert currencies on mobile.
unitMeasure - A sleek unit calculator for android
Yahoo! Finance - Currencies Center - Currency Converter from Yahoo! Finance.