When the terms architectural, engineering, and construction are mentioned regarding design software, one name comes to mind: AutoDesk. They company has made available some pretty amazing software for Android, like AutoCAD, SketchBook, Inventor Publisher, and Design Review. Now, it has released its popular three-dimensional engineering software ForceEffect to the Play Store.

ForceEffect offers some very nice features:

Freehand sketching of elements and construction lines with snaps, constraints, and inferencing

Object dimensioning, global scaling, units, constraints

Import image as background

Create joints (welded, pinned)

Break element at joints

Create supports (fixed, grounded, sliding)

Create loads (known, unknown, distributed) and moments

Add weight to individual elements

Compute reaction forces and moments for equilibrium and over-constrained systems

Toggle forces to show force vector components

Results reporting with picture, results, all equations

Save and load files from Autodesk 360

In app tutorials

Best of all, it's completely free, so even if it looks like something you'd just like to play with, you're not spending a penny to give it a shot.