EvotecIT/PSTeams
PSTeams is a PowerShell Module working on Windows / Linux and Mac. It allows sending notifications to Microsoft Teams via WebHook Notifications. It's pretty flexible and provides a bunch of options. Initially, it only supported one sort of Team Cards but since version 2.X.X it supports Adaptive Cards, Hero Cards, List Cards, and Thumbnail Cards. All those new cards have their own cmdlets and the old version of creating Teams Cards stays as-is for compatibility reasons.
Health Breakdown
Should you contribute to EvotecIT/PSTeams?
EvotecIT/PSTeams has a FoundDev health score of 88/100, which puts it in the active-and-maintained tier. The maintainer team is shipping recently, issues are being closed, and a PR you open this week has a realistic chance of being reviewed.
Last push was 0 days ago — that signals an actively maintained project. New issues are likely to get a maintainer response within days. The project is written primarily in C#, so prior C# experience will shorten ramp-up.
Licensed under MIT, a standard OSI-approved license — safe to contribute to under normal employer IP policies.