Wireless Network Watcher - scans your wireless network and displays the list of all computers and devices that are currently connected to your network.
Thunderbird - Thunderbird is a free email application that's easy to set up and customize - and it's loaded with great features!
Nmap - Nmap Free Security Scanner, Port Scanner, & Network Exploration Tool. Download open source software for Linux, Windows, UNIX, FreeBSD, etc.
Mailbird - Mailbird is the best email client for Windows 7, 8 and 10
Angry IP Scanner - Open-source and cross-platform network scanner designed to be fast and simple to use
Microsoft Outlook - Organize your world. Outlook’s email and calendar tools help you communicate, stay on top of what matters, and get things done.