Simple IP Config is described as 'small, portable IP changer utility to change common Windows network settings quickly and easily without having to click through the endless system windows'. There are more than 10 alternatives to Simple IP Config for a variety of platforms, including Windows, Linux, Self-Hosted solutions, Online / Web-based and Android. The best alternative is Fing, which is free. Other great apps like Simple IP Config are NetBox (Free, Open Source), SoftPerfect Network Scanner (Paid), Wireless Network Watcher (Free) and phpIPAM (Free, Open Source).
NetBox is an open source web application designed to help manage and document computer networks. Initially conceived by an engineering team at DigitalOcean, it was developed specifically to address the needs of network and infrastructure engineers.
phpipam is an open-source web IP address management application (IPAM). Its goal is to provide light, modern and useful IP address management. It is php-based application with MySQL database backend, using jQuery libraries, ajax and some HTML5/CSS3 features.
TeemIP is an open source, web based DDI (DHCP, DNS, and IP Address Management (IPAM)) tool that provides comprehensive IP management capabilities with IP discovery, to manage VLANs, WAN links, AS numbers, VRFs, DNS domains, DHCP management, DC visualization and more.
IP Address Management (IPAM) in Windows Server® 2012 is an integrated suite of tools to enable end-to-end planning, deploying, managing and monitoring of your IP address infrastructure, with a rich user experience.
HoverIP is a comprehensive network software solution that shows you adapter configuration and lets you perform various IP tasks. This isn't the kind of tool aimed at rookies, but more at professional users who know what's that a “ping” or a “routing table”.