In this latest version, they enhanced the iOS command support as well. It has support for CSS, and javascript programming. It will allow you to create a different network at a time. You can read a lot more detail about the cisco packet tracer 6.3 from here. Newbie learns the complex concept of networking more quickly.
This tool is amazing for teaching and really helpful to train the student and developed professional skills in a newbie. Some of the major alternatives of the Cisco Packet Tracer are ReadyTech, CBT Nuggets, A Cloud Guru, Heropa, Learn on Demand Systems, CloudShare, AWS Self-Paced Labs, and Practice Labs. You can read more details and download the latest version of the cisco packet tracer from the official website. Cisco Packet Tracer 6.3 has a Proprietary license that means it is not freeware software. It is available in the English language for now. It is supported by all the major operating systems. The stable version release is Cisco Packet Tracer 8.0.
Cisco Packet Tracer is a tool that is developed by Cisco to check the topologies.