
GNU Wget
HTTrack
SiteSucker
WebCopy
ScrapBook
Web ScrapBook
Offline Explorer
ArchiveBox
PCBWeb
Pspice
Oregano
Solve Elec
BlackBoard Circuit Designer
PCB Wizard
McCAD 3SPICE
Circuit Simulator
PCBWebHTTrack - HTTrack is a free (GPL, libre/free software) and easy-to-use offline browser utility.
Pspice - OrCAD PSpice technology provides the best, high-performance circuit simulation to analyze and refine your circuits, components, and parameters before committing to layout and fabrication
SiteSucker - SiteSucker is a Macintosh application that automatically downloads Web sites from the Internet.
Oregano - oregano - An electrical engineering tool for GNOME
WebCopy - Cyotek WebCopy is a free tool for copying full or partial websites locally onto your harddisk for offline viewing.
Solve Elec - Solve Elec is a free educational program to draw and analyze electrical circuits.