What are some alternatives?
When comparing BlueCAD 1.0 and JustCAD, you can also consider the following products
LibreCAD - An open source 2D CAD application for Windows, Apple and Linux.
QCAD - QCAD is an application for computer aided drafting in 2D.
DraftSight - Discover Dassault Systèmes®' DRAFTSIGHT™ Professional CAD software that lets you create, edit, view and markup any kind of 2D drawing. Learn more here.
TigerCad - A completely free, simple technical drawing software (CAD)
Piglet Drawing Editor - 2-D engineering drawing editor that supports hierarchical object description
DeltaCAD - Powerful, easy to learn 2D CAD (Computer Aided Design) program designed to meet all of your CAD...