If you have read about explicit, geometry-based 3D CAD, you know it is the best approach for creating flexible, lightweight designs. Now, PTC brings you a free download from the CoCreate product family - CoCreate Modeling Personal Edition, a 3D CAD system you can use for assemblies with up to 60 parts. Download a FREE version of CoCreate Modeling Personal Edition today and see how liberating an explicit, geometry-based 3D CAD system can be.

EC Praxis is is used for the design of composite beams and steel connections according to Eurocodes. It functions within an integrated environment that automatically extracts all the necessary data (geometry, member profile, loads etc.) from the model that has been previously created in ETABS or in SAP2000.

Calculate the percentage of any number out of any number.
Great little tool to have on anyones desktop.

Download T-Flex 3D parametric mechanical design CAD CAM software free. Assembly design, kinematic, dynamic and FEA simulation, CNC Milling Lathe Turning and Wire EDM. View, edit and convert SolidWorks, Autodesk Inventor, Solid Edge assemblies SLDPRT. T-Flex CAD software sports a unique proprietary vector construction method for creating feature profiles. Constraints can be assigned either implicitly or "on the fly".

ChemMaths is a chemical engineering,mathematical and chemistry program. Software suitable for chemistry,chemical engineering students and professionals.Contains information on 3000+ chemical compounds,allows predition of chemical compound properties,critical constants, thermodynamic properties etc,periodic table, solves 400+ chemical/electrical/mechcanical engineering, phyics, and mathematical equations. Contains 200+ unit conversions & more.

This application uses a highly flexible, general, finite element method for static analysis of trusses. It features a versatile-easy interface and the most reliable finite element calculation library.It features a powerful, interactive and easy interface.Its simple interface results into time saving while modeling and analyzing any type of static system.Static analysis in a couple of mins!

This application uses a highly flexible, general, finite element method for static analysis of multi span beams, 2D Trusses and 2D Frames.It features a versatile-easy interface and the most reliable finite element calculation library.It features a powerful, interactive and easy interface.Its simple interface results into time saving while modeling and analyzing any type of static system.Static analysis in a couple of mins!

Curvilinear: Easy Learning Plane Analytic Geometry

An Intuitively-Easy-To-Use visual interactive software, oriented to overcome the abstraction that exists in the Plane Analytic Geometry (PAG), this is a tool that makes it easy to learn and master the PAG, the user is allowed to literally "see" the mathematics while carrying out operations and problems by hundreds in a very short time with the help of the mouse.

Panageos is oriented to the intensive solution of problems on Plane Analytic Geometry.
The main feature of Panageos is its power to read the user's equations and interpret them, for this reason the data input is exclusively through the keyboard (coefficients of several types of equations are entered via keyboard).

Visual Mathematics is a highly interactive visualization software (containing -at least- 67 modules) addressed to High school, College and University students. This is a very powerful tool that helps to learn and solve problems by the hundreds in a very short time. 
Visual Mathematics, a member of the Virtual Dynamics Mathematics Virtual Laboratory, is an Intuitively-Easy-To-Use Mathematics visualization software.