Merge pull request #658 from dubinsky/build-tools-other-than-sbt

Mention build tools other than sbt.

Author: sjrd

doc/index.md

@@ -14,6 +14,15 @@ To install Scala and Node.js, follow the [Prerequisites](tutorial/#prerequisites
 Scala.js itself is managed by your Scala build tool of choice.
 You can follow [the Getting Started instructions](tutorial/scalajs-vite.html#introducing-scalajs) to enable it.
 
+# Build tools other than sbt
+
+This documentation uses
+[sbt](https://www.scala-sbt.org/) build tool exclusively;
+other build tools that support Scala.js are:
+- [scala-cli](https://scala-cli.virtuslab.org/install/#scala.js)
+- [Mill](https://mill-build.org/mill/scalalib/web-examples.html#_scala_js_modules)
+- [Gradle](https://gradle.org) with [Scala.js / Scala Native plugin](https://github.com/dubinsky/scalajs-gradle)
+
 # Other resources
 
 * [Presentation videos](../community/presentations.html)