IT Buddy is a free iPhone application developed by Pale Blue Software Ltd. It has been specifically designed for Systems/Network Engineers, providing them with a range of useful tools and features. With IT Buddy, users can easily calculate their network, scan their local network, scan hosts for open ports, check their LAN and WAN IP addresses, and even ping any host, whether it's on the LAN or WAN.

One of the main features of IT Buddy is the LAN Scan tool, which allows users to scan their local network and gather information about the connected devices. This can be particularly helpful in troubleshooting network issues and identifying potential problems.

Another useful feature is the Port Scan tool, which enables users to scan hosts for open ports. This can be valuable for network security purposes, as it allows users to identify any potential vulnerabilities in their network.

IT Buddy also includes an IP Calculator, which helps users calculate various network-related parameters, such as subnet masks, network addresses, and broadcast addresses. This can be handy for network planning and configuration.

Additionally, the application features an RBL Checker, which allows users to check if their mail server is listed in any Real-time Blackhole List (RBL). This can be important for ensuring the deliverability of emails and preventing them from being marked as spam.

Lastly, IT Buddy offers a Ping tool, which allows users to ping any host on their network, whether it's on the LAN or WAN. This can be useful for checking the connectivity and response time of various network devices.

Overall, IT Buddy is a comprehensive and user-friendly application that provides Systems/Network Engineers with a range of essential tools for managing and troubleshooting networks. With its intuitive interface and powerful features, IT Buddy is a valuable companion for professionals in the field.