If you have an Apple iphone, then the following applications ("apps") have proved useful to scientists:
Analog Scientific Calculator: This retro calculator replicates the Mannheim Slide Rule used by scientists, engineers and students for over a century.
Chemical Elements: View all the chemical elements in two interfaces with general features of all the elements included
iFXRates Currency Conversion Calculator: Use this app to calculate currency conversion rates between the most popular currencies. Calculate currency conversion rates between the most popular currencies.
Physics Dictionary: Tap into definitions and meanings of common terms. A quick reference which is useful for Physics exams and tests.
PhysOrg.com Science and Technology News: Learn about physics, earth science, medicine, nanotechnology, electronics, space, biology, chemistry, computer sciences, engineering, mathematics and other sciences and technologies through this powerful free app.
Scientific Calculator: This easy-to-use calculator contains advanced functions — cosine, sine, tangent, square root, exponents and more
Unit Converter: This app contains the most common units of measurement used in the United States and Europe, for area, speed, distance, temperature, volume and more
Weighted Attribute Balance Evaluator: This app allows users to make decisions based upon comparative analysis by listing weighting or valuing pros and cons on a single grid.