LTspice - LTspice® is a high performance SPICE simulation software, schematic capture and waveform viewer with enhancements and models for easing the simulation of analog circuits.
Large - On-demand Slack bot that can get you anything for the office
Circuit Tree - Design and order Boards in Minutes
KiCad - A Cross Platform and Open Source Electronics Design Automation Suite
Circuit Simulator - Animated electronic circuit simulator using ideal components to visualize voltage and current.
Proteus PCB design - Proteus PCB design combines the schematic capture and ARES PCB layout programs to provide a...