Equation Editor

LibreOffice Calc is the spreadsheet program you've always needed. A fork of OpenOffice.

Mathway is a freemium math solving app that helps you find the solutions to any math problem you can imagine.

EES (pronounced 'ease') is a general equation-solving program that can numerically solve...

Synchronizing, online-based word processor, part of Google Drive.

Gnumeric

Microsoft Math Solver is a simple to use math problem solving and calculator application that provides you with an extra edge to the students to make sure their solutions are right.

Learn and help others learn

Open Source

Maximize profits using a plant-wide simulation solution that combines unparalleled accuracy and engineering collaboration with time-saving workflows.

Program that solves numerically algebraic systems of non-linear, and linear, equations.

EtherCalc is a web spreadsheet.

Collaborative engineering. A Github for engineering

Beautifies Excel to JavaScript/JSON format.

Open Source

Math, part of the https://alternativeto.