Advanced Port Scanner is described as 'fast and free software for port scanning. It will allow you to quickly find all open ports (TCP and UDP) and detect versions of programs running on them. The utility includes many features simplifying network management' and is an app in the Network & Admin category. There are more than 25 alternatives to Advanced Port Scanner for a variety of platforms, including Windows, Mac, Linux, Android and iPhone. The best alternative is Nmap, which is both free and Open Source. Other great apps like Advanced Port Scanner are Angry IP Scanner (Free, Open Source), Fing (Freemium), Advanced IP Scanner (Free) and Port Authority (Free, Open Source).
Angry IP scanner is a very fast IP address and port scanner. It can scan IP addresses in any range as well as any their ports. It is cross-platform and lightweight. Not requiring any installations, it can be freely copied and used anywhere.
Reliable and free network scanner to analyse LAN. The program shows all network devices, gives you access to shared folders, provides remote control of computers (via RDP and Radmin), and can even remotely switch computers off. It is easy to use and runs as a portable edition.
A handy systems and security-focused tool, Port Authority is a very fast Android port scanner. Port Authority also allows you to quickly discover hosts on your network and will display useful network information about your device and other hosts.