Geometry Expressions is the world's first interactive symbolic geometry system. Create geometric figures using symbolic constraints and produce measurements not only numerically but also symbolically.

For engineers: create conceptual designs and generate explicit mathematics.  Export to Maple or Mathematica

For educators: put mathematical modeling into your curriculum.

Math Illustrations is a tool for mathematics teachers to create diagrams for inclusion in tests, worksheets, homework or presentations.

Makes it easy to create accurate, annotated geometry.

Our mechanical engineering products center around Analytix, a conceptual design and analysis tool.  Analytix is useful in the first stages of design and analysis of a mechanical product.

Analytix includes kinematic, static, dynamic, inverse dynamic and tolerance analysis.

From an interactive Euclid's Elements for the 21st Century, as an eBook for your iPad, to a collection of whimsical mathematical clocks, we have a range of eBooks and Apps for your enlightenment and entertainment.

Euclid's Muse is our website with hundreds of free interactive mathematical apps.  The apps run in your browser on your computer, or on your tablet or smart phone.

Geometry Expressions users can post their own apps to Euclid's Muse.

Saltire's Geometry Gallery is a collection of Java applets showing interesting geometry configurations. All applets are dynamic. In some cases, points can be dragged. In other cases dimensions can be changed via edit controls. Some of the applets feature animation.

Geometry Expressions version 3 contains features for the automatic creation of HTML5 / JavaScript apps.

Our HTML5 Gallery highlights these apps.