Added Transitive (#83)

Author: chfritz

images/libraries/transitive.svg

@@ -29,7 +29,7 @@
       </div>
 
       <div class="masthead">
-        is a collection of open-source libraries and tools for building web-based robot apps with <a
+        Open-source libraries and tools for building web-based robot apps with <a
           href="https://ros.org/" target="_blank">ROS</a>.
       </div>
     </div>
@@ -99,6 +99,14 @@
               <div class="card-description">Native Node.js ROS1 client implementation</div>
             </div>
           </a>
+
+          <a href="https://transitiverobotics.com" target="_blank">
+            <div class="card">
+              <div class="card-image"><img src="images/libraries/transitive.svg"></div>
+              <div class="card-name">Transitive</div>
+              <div class="card-description">A framework for building robot web portal</div>
+            </div>
+          </a>
         </div>
       </div>