DOC is described as 'software dedicated to the design and calculation of single-line diagrams of electrical systems in low and medium voltage, allowing the user to choose switching devices and security, and for verification and coordination of protective devices'. There are more than 10 alternatives to DOC for a variety of platforms, including Windows, Online / Web-based, iPhone, Self-Hosted solutions and SaaS. The best alternative is Catia. It's not free, so if you're looking for a free alternative, you could try BetterDocs or EKTS (Electrical Control Techniques Simulator). Other great apps like DOC are See Electrical (Paid), EPLAN Electric P8 (Paid), SolidWorks Electrical (Paid) and ETAP (Paid).
Vision Network Analysis is a program for the planning, design and management of electricity networks. The package can very easily carry out load flow and short-circuit calculations as well as fault and reliability analyzes.
Electra® Cloud offers impressive benefits that more than save time or eliminate tedious work, it leaves then engineer free to focus on the important parts of a design, the control scheme, operations and safety of the entire machine.