fxSolver
WolframAlpha
SpeedCrunch
Qalculate!
Numi App
Soulver
Wolfram Mathematica
MATLAB
COCO Simulator
CHEMCAD
CADSIM Plus
DWSIM
gPROMS
Aspen HYSYS
Aspen Plus
myQuorum
Calculate multiple equations at once, Edit existing formulas and Create new ones, Compute large numbers of values, Plot graphs, Link your results, Solve full problems and Share worksheets with your friends.
fxSolver is a free tool developed by a team of engineers and programmers with the sole intention of providing a unique, useful and free service. The vision of the development team is to allow students, engineers, and hobbyists to come in contact with mathematics and to be able to solve problems without necessarily being familiar with professional math software or programming languages.
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WolframAlpha - WolframAlpha brings expert-level knowledge and capabilities to the broadest possible range of people—spanning all professions and education levels.
CHEMCAD - We equip chemical engineers with integrated and intuitive process simulation software to tackle projects large and small. Discover how CHEMCAD can help you design, analyze and measure simple and complex processes like never before.
SpeedCrunch - SpeedCrunch. SpeedCrunch is a high-precision scientific calculator featuring a fast, keyboard-driven user interface. It is free and open-source software, licensed under the GPL. Download Documentation Donate .
CADSIM Plus - CADSIM Plus is a chemical process modeling and simulation software capable of simulating detailed furnace assemblies and associated equipment.
Qalculate! - Qalculate! is a multiplatform multi-purpose desktop calculator.
DWSIM - DWSIM is an open-source CAPE-OPEN compliant chemical process simulator for Windows and Linux.