What are the main differences between DoubleCAD XT and DoubleCAD XT Pro?
DoubleCAD™ XT is a full-powered 2D AutoCAD LT® work-alike and is free. DoubleCAD XT Pro is also a full-powered 2D AutoCAD LT work-alike but has many more features (for both architectural and mechanical users), superior drafting & detailing capabilities (create associative, 2D views or hatched sections, even from xrefs), some incredibly useful facilities like drawing compare, hatch pattern creator, geometric and dimensional constraints, and explodeable viewports, a range of intelligent (parametric) architectural objects, one of the widest ranges of industry file filters, and 12-months free premium support (phone, email, forum). DoubleCAD XT Pro is $695.