Add Schema Guru implementations

Author: chuwy

content/implementations.html

@@ -103,6 +103,7 @@ <h3>.NET</h3>
 	<h3>Online (web tool)</h3>
 	<ul>
 		<li><a href="http://www.jsonschema.net/">jsonschema.net</a> - generates schemas from example data</li>
+		<li><a id="link-impl-guru-ui" href="http://schemaguru.snowplowanalytics.com/">Schema Guru Web UI</a> - derives precise Schemas using several JSON instances. Based on <a href="link-impl-guru">Schema Guru</a></li>
 	</ul>
 
 	<h3>TypeScript</h3>
@@ -119,6 +120,11 @@ <h3>Python</h3>
 	<ul>
 		<li><a id="link-impl-jsl" href="https://github.com/aromanovich/jsl">JSL</a> (BSD) - a Python DSL for defining JSON Schemas</li>
 	</ul>
+
+	<h3>Scala</h3>
+	<ul>
+		<li><a id="link-impl-guru" href="https://github.com/snowplow/schema-guru">Schema Guru</a> (Apache 2.0) - CLI util, Spark Job and Web UI for deriving JSON Schemas out of corpus of JSON instances</li>
+	</ul>
 </div>
 
 <div class="show-hide" data-target="parsing-list"></div>