Numi App - Numi is a beautiful text calculator for Mac.
OneConvert - OneConvert - fast online calculator and free file converter. Allows to convert different file formats and allows quick and accurate conversion between many units of measure.
ConvertAll - A comprehensive unit conversion program.
iLovePDF - Free online PDF tool set
Calculator++ - Calculator++ is an advanced, modern and easy to use scientific calculator.
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.