Silhouette PlugIn 

Silhouette is a plugin for Adobe Illustrator 8, 9 and 10 to convert bitmap images to vectors images with unique correction tools. The smartest way from bitmap to vectors! Available for Windows and Macintosh.
vectorization convert trace bitmap plugin illustrator correction adobe

Raster Handler for ERDAS Imagine to MapInfo 

Allows to display and register rasters of ERDAS Imagine (*.IMG files) in MapInfo. Georeferenced *.IMG images will be displayed directly in MapInfo Professional, MapX, and MapXtreme environments. For free: img2tab utility, Erdasreg.mbx.
mapinfo mapbasic rad tool visual free erdas imagine gis mbx application raster register

Ulead COOL 3D Studio 

Ulead® COOL 3D? Studio is 3D graphics and text animation software that offers an efficient, intuitive interface with professional production capabilities for output to video, Web, and multimedia presentations.
3d animation text titling graphics titler flash macromedia after effects adobe

Mechanics 

Mechanics is a Virtual Laboratory of Mechanics. An Intuitively Easy-To-Use collection of -at least- 51 interactive Mechanics simulation modules that allow the user to simulate and visualize experiments. An enlightening set of simulators.
physics mechanics force pendulum momentum friction energy motion newton rectilinear parabolic equilibrium acceleration

FreeDesktop 

It is a desktop draw tool, can lock desktop,and draw line on it free,you can set line's color or width.Clear the points(lines) that you drawed(when you clear on Desktop,it will be magic)!,for education,demo,explaining,for doodling too.
delphi c++ builder cad graphic component draw line rectangle

Serif 3DPlus 

For 3D scenes, logos, animations, models. Award winning. Unusually good display: built-in DirectX; palette/depth/dither accurate Export Preview; five anti-aliasing levels. Includes fonts, objects, etc. FREE. Registration required.
free 3d drawing illustration model logo text font animation lighting render effect fog directx