Altium Designer is an industry leading Electronic Design Automation (EDA) software package. It is used to design and develop electronic systems, including printed circuit boards, embedded systems, and integrated circuits. The software provides a comprehensive suite of tools and features, including schematic capture, PCB layout and routing, FPGA design, 3D visualization, and more. With Altium Designer, users can quickly and efficiently create high-quality designs. The software is regularly updated to ensure it remains cutting-edge and up-to-date with industry trends. Altium Designer is a comprehensive and reliable design solution for professionals and hobbyists alike.
fritzinf does not allow simulation
The project is still fresh, but very promising. The developers have spent a lot of time thinking about a suitable library file format that avoids the problems of current open source EDA assemblies and makes it easy to create and share integral part libraries. It is also much better in terms of usability than current alternatives such as KiCAD.
Cheaper but fully competent, and sufficient for most designs.
KiCad
Fritzing
QUCS
LibrePCB
Autodesk EAGLE
OrCAD (All Products)
Proteus PCB design
NI Circuit Design Suite Power Pro
gEDA Project
DipTrace
DesignSpark PCB
iCircuit
Upverter
TINA
VUTRAX
Schematics
Micro-Cap
PCBWeb
LochMaster
Ngspice
Discontinued The program seems to be no longer updated. The latest version, 0.9.3b, released in June 2016, can still be downloaded from the official website.