Proteus (Labcenter)
Proteus, by Labcenter, provides circuit simulation with an emphasis on microcontroller emulation (PIC, AVR, ARM). The built-in VSM (Virtual System Modelling) allows code debugging and peripheral testing before hardware is built. A PCB layout module offers routing, DRC, and a 3D board view. Its large device library covers many embedded components, sensors, and indicators. Proteus is widely used in educational settings for robotics or IoT proof-of-concepts, letting students see code running on simulated hardware. For small to mid-scale electronics, Proteus merges powerful simulation with decent layout capabilities.