Wolfram Alpha is a "Computational Knowledge Engine" - different from a search engine, it answers factual queries directly by computing the answer from structured data, rather than providing a list of documents or web pages that might contain the answer.
PCalc is the powerful choice for scientists, engineers, students, programmers, or indeed anybody looking for a feature rich calculator. It includes an optional RPN mode and multi-line display, a choice of button layouts, an extensive set of unit conversions and constants, a...
The only gesture-based calculator on the Play Store. makina |m??ki?n??| Noun the calculator application making arithmetic calculations using gesture-based controls
Tap and swipe your way through calculations with makina. makina is possibly the most beautiful calculator app in th.Discontinued
The app is no longer updated and the official website is no longer available. Last version, 0.9.3 (Beta 3), released in November 2012, can be still downloaded from the Google Play Store