Wolfram Alpha

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...

Freemium Android iPhone iPad Web Kindle Fire Windows Phone

Avogadro

Avogadro is a free, fantastically easy to use molecule editor. Because this editor is cross platform and light on computer resources, you know you can run it when and where you need it.

Free Open Source Mac OS X Windows Linux

GNU Units

The Units program converts quantities expressed in various scales to their equivalents in other scales. The units program can handle multiplicative scale changes as well as nonlinear conversions such as Fahrenheit to Celsius or wire gauge.

Free Open Source Linux

Jmol

Jmol is a free, open source molecule viewer for students, educators, and researchers in chemistry and biochemistry. It is cross-platform, running on Windows, Mac OS X...

Free Open Source Mac OS X Windows Linux

pymol

PyMOL is a powerful and comprehensive molecular visualization product for rendering and animating 3D molecular structures.

Commercial Mac OS X Windows Linux

Unit Converter Tool

Unit Conversion Tool is a powerful, award-winning and easy-to-use utility for quick and accurate conversion between almost every possible unit of measure, from one...

Freemium Windows

Rasmol

RasMol is a computer program written for molecular graphics visualization intended and used primarily for the depiction and exploration of biological macromolecule...

Free Open Source Mac OS X Windows Linux

Chemio

Periodic table app for chemistry with solubility table, molar calculator, and atom models.

Commercial iPad

Physics Formulas Calculator

Physics Formulas Calculator comprises a selection of 119 different calculators that will simplify calculations which have given you headaches so far. Complex...

Commercial Mac OS X

ThinkCalculator

Think calculator for Finance, Math, Geometry, Converter, Physic & Chemistry, Webtoolsm Date and time and more

Free Web

Ghemical

Ghemical is computational chemistry package, which is licensed under GNU GPL . The ghemical authors are listed here . Ghemical is implemented using the C++...

Free Mac OS X Windows