Some drilling by Fredo 6 VisuHole
For Sketchup free
Acute has launched a new release of its two editions Smart3DCapture Free and Smart3DCapture Basic.
This new release includes the support of AMD, Intel integrated graphics.
With Smart3DCapture, everyone can easily turn simple photographs into 3D models that can be published on the internet or printed in 3D.
Try it now on http://community.acute3D.com
Moi3D 3.0 Infinite Demo without save! PC + MAC 
But with this little Script “one line” you can have a “Copy screen” at any size! 
(French one)
By Michael Gibson creator of Moi3D
You can of course modify any thing you want following your graphic card size!
script: /* Print Screen on the Clipboard */ var prev_background = moi.view.viewportBackgroundColor; moi.view.viewportBackgroundColor = 0x000000; moi.view.lineWidth = 4; moi.grid.display = false; moi.grid.showXYAxes = false; moi.ui.getActiveViewport().renderToClipboard( 2560, 2560 ); moi.view.lineWidth = 1; moi.grid.display = true; moi.grid.showXYAxes = true; moi.view.viewportBackgroundColor = prev_background;
A very old test of that! 
HeeksCNC 1.0 CAD/CAM software. Trial = Free version.
http://www.heeks.net/
meshmixer 2.5
http://www.meshmixer.com/download.html
Even the free Version (Make)
And some cool new functions! The rotation tool is also valuable in the free!
Modo is also good but they have only 30 day free trial.
For Nurbs lovers! 
STL export! Imports SKP, KMZ, DWG, DXF, DAE, OBJ and STL
http://www.formz.com/products/formzfree.html
http://www.formz.com/featureslist/FeatureComparisonChart.html