Secure instant messaging system for team collaboration
LAN Messenger - LAN Messenger is a decentralized UDP IM-style chat client which supports usernames...
System76 Oryx Pro - System76 Oryx Pro is a powerful and customizable laptop that comes with Linux pre-installed, but y can easily install Window and dual-boot if you want to use it for Windows development or gaming.
Softros LAN messenger - LAN messenger for an internal office chat for home or business users. It does not require a server and is very easy to install and use. It supports personal chats, group chats, message brodcasting, files transfer and remote desktop access.
Dell Precision 7730 - Very robust 17" workstation with flexible configuration options, the cheapest display is not recommended however. Read review here.
Bopup IM Suite - Organize secure messaging system and communicate instantly via self-hosted IM server.
HP ZBook 17 - The performance of a desktop with the freedom of a laptop.