XE.com - XE.com Inc. (XE) is a Canadian online foreign exchange services company.

SciDaVis - SciDAVis is a free application for Scientific Data Analysis and Visualization.

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.

LabPlot - LabPlot is a KDE-application for interactive graphing and analysis of scientific data.

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.

DataMelt - DataMelt (DMelt), a free mathematics and data-analysis software for scientists, engineers and students.