
GNU Wget
HTTrack
SiteSucker
WebCopy
ScrapBook
Web ScrapBook
Offline Explorer
ArchiveBox
Virtual Breadboard
Pspice
Oregano
BlackBoard Circuit Designer
Solve Elec
PCBWeb
Circuit Simulator
PCB Wizard
HTTrack - 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.
BlackBoard Circuit Designer - Help building prototypes on so called breadboards easily