Hanley InnovationsWillimantic,
Ct,
United Stateshttp://www.hanleyinnovations.comBuild the best possible wings for your model airplane using VisualFoil(TM) and WingSections(TM)software. 

Image Scaling ApplicationAustraliahttp://www.blocklayer.com/scale-fixereng.aspxFree to use image scaling web app.  Load image, click and drag to measure and enter known dimension to set scale.  Enter your model scale to measure full scale and your scale.  Also displays scale rules to print, cut and measure from the printed image. 

SCARM - Simple Computer Aided Railway ModellerSofia,
Sofia,
Bulgariahttp://www.scarm.info/index_en.htmlSCARM is freeware program for simplified design of scaled model railway layouts and modelling of miniature model track routes.  It has lightweight and intuitive user interface, 3D view and many other functions and features. 

RC CADhttp://www.rccad.comRC CAD is an acronym for "Radio Control - Computer Aided Design".  This software is specially designed to help modelers to create airplanes.  It supplies a real-time 3D visualization of the model you are designing. 

ArcaMagica Packaging TemplatesUnited Stateshttp://www.arcamagica.comMake your own box without a special software! 
Royalty-free templates which you can use for preparing great packaging of any style - boxes, POP displays, table stands and gift wraps.  Download a FREE catalog featuring 3D images of finished packages. 

Jedicut : Free CNC softwareParis,
Francehttp://www.aeropassion.netedicut is a free CNC software for CNC foam cutting board, allowing you to cut wings and fuselages.  There are many CNC board kit but software are not always adapted to model aircraft making use and Jedicut is free.