Output Messenger Server 2.0.41

Communicate with your team and share your ideas, work updates using one-one communication. Share files, images, videos to your colleagues just by drag and drop in one-on-one messaging as well as group chats.
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Softros LAN Messenger 9.6.1

Softros LAN Messenger is an easy-to-use LAN messaging application for safe, secure and effective intra-office communication. It does not require a server to run and is very easy to install. Softros LAN IM comes with a variety of handy features such as PC-to-PC messaging, group LAN chat rooms, broadcast messaging to quickly notify selected individuals or groups about an event, and also drag-and-drop file transfer to exchange files and folders between staff members. All messages and files exchanged by the users are securely encrypted and never go outside your local company network, which guarantees that no unauthorized person will ever read your private correspondence or access your sensitive data.
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Telegram 5.9.0 Stable | 5.9.2 Beta | Portable | RePack by elchupacabra | Android | iOS

Telegram Messenger is messenger from Pavel Durov — Creator of the social network Vkontakte. At this point, Telegram is one of the most technologically free and advanced instant messengers. Using Telegram can be free to exchange messages similar to SMS, but without restrictions on length.
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LizardSystems LanSend 24.11.1 | LizardSystems Network Products AIO DC 2021.09.02 | Portable

LanSend is an invaluable tool for system administrators for sending out instant messages to network users. LanSend has a simple, logical GUI and enables you to send a message to multiple users on your LAN with just a few mouse clicks. No additional software needs to be installed on users' machines for them to receive messages.
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