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.
Elk - The fastest way to convert currencies on mobile.
unitMeasure - A sleek unit calculator for android
Simple Online Tools by Solvid. - A collection of simple and handy online tools.
Unit Converter - It's More easy to covert the UNITS now with the APP