The main tool is a configuration parser. Instead of using Notepad or other text editors, it's purpose-built for networking.
There's also an access-list evalulator to test packets against access-lists.
Just start typing and it goes right to work.
Your configuration workspace is saved to your device—not to a cloud service. You stay in control of your data and your passwords.
It supports configurations from Cisco IOS/IOS XE devices, for common features, especially those used in enterprise/corporate networks.
There's no catch. Well, maybe one catch: it's not Free Open Source Software: You can use it, and even see a compiled version of what makes it work, but not re-host it or change it. Let me get it working well before I open it up.
Ok, maybe two catches: Yes, there's ads on it, and it uses analytics to see how much usage it gets and from where.
Your browser's privacy settings or the use of private browsing mode may prevent saving of configurations. To save configurations, disable these privacy settings or don't use private browsing.