&quot;Mono is a free and open source project led by Xamarin&quot; <a href="https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;Mono_(software)" rel="nofollow">https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;Mono_(software)</a><p>But Xamarin have wisely moved into a wider place in the .NET tools ecosystem so that they don&#x27;t <i>only</i> do mono, i.e. so they don&#x27;t live and die with it.<p>Mono has been important and useful. But it may not continue to be that.