LITIO is a sheet metal program that calculates flat (unfolded) sheet development of ducts, rectangle to ound transitions, cylinders, cones, pipe intersections, connections, bifurcations, elbows, etc. For HVAC, hoppers, cyclones, dust extraction, ducts, conveying systems, silos, piping, etc. To draw your sheet metal developments directly in AutoCAD R2000 and later (no need of DXF convertions).
XDE Spell Checker XDE's Spell Checker Server may be installed on NT IIS and Unix derivatives.
VolumeTouch Free replacement for Windows volume control. Various keyboard and mouse shortcuts. Support mouse wheel and mouse positioning control. Works from any application.