Slack alternative, via https://links.yome.ch/?XdWiDw

This PowerShell module includes various functions that utilize the Slack API to create a command and control channel. The main function, Start-Shell, will connect to a user-specified Slack channel and authenticate using a supplied API authentication token for a given Slack team and user. Any command typed into the channel will then be executed, in PowerShell, on the host.

Via https://www.it-connect.fr/slackshell-un-module-powershell-pour-slack/