You can download Scalate from the Sonatype repository.

sbt

If you build your project using sbt then just add the following to your build.sbt or project/Build.scala

libraryDependencies +=
  "org.scalatra.scalate" %% "scalate-core" % "{latest version}"

Maven

If you build your project using Maven then just add the following to your pom.xml

<dependency>
  <groupId>org.scalatra.scalate</groupId>
  <artifactId>scalate-core_2.12</artifactId>
  <version>{latest version}</version>  
</dependency>

The releases should be synchronized to the central maven repository so you should not need to add a maven repository to your pom.xml.

However if a release has not yet made it to the central repository or you want to add a repository for completeness, add the following to your pom.xml

Snapshots

If you want to use a snapshot version you should ensure you have the Scalate Snapshot Maven repository defined in your pom.xml

  
<repositories>
   <repository>
     <id>sonatype snapshots</id>
     <name>Sonatype Snapshot Repository</name>
     <url>https://oss.sonatype.org/content/repositories/snapshots</url>
     <snapshots>
       <enabled>true</enabled>
     </snapshots>
     <releases>
       <enabled>false</enabled>
     </releases>
   </repository>
 </repositories>

If you prefer you can try building from the source code and building it