XE.com - XE.com Inc. (XE) is a Canadian online foreign exchange services company.
Numi App - Numi is a beautiful text calculator for Mac.
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.
Valuta+ - Valuta+ is a super simple & free currency converter. The interface is fast and makes you convert exchange rates very easily. This app have more than 160+ currencies for you and is always updated.
Calculator++ - Calculator++ is an advanced, modern and easy to use scientific calculator.