diff --git a/index.html b/index.html
index b7a5699..214e1d5 100644
--- a/index.html
+++ b/index.html
@@ -173,14 +173,38 @@ <h6>Selecting an output format</h6>
         </div>
         <div class="col-lg-3">
           <div class="card bg-light">
-            <h5 class="card-header text-white bg-info">Support</h5>
+            <h5 class="card-header text-white bg-success">Support</h5>
             <div class="card-body">
               <p class="card-text">If this tool was useful to you, please consider making a small <a href="https://ko-fi.com/rintzezelle">donation</a>, or starring the <a href="https://github.com/rmzelle/ref-extractor/">GitHub repository</a>. Your support is much appreciated.</p>
               <div class="text-center" style="font-size: small;">
-                <a href='https://ko-fi.com/rintzezelle' target='_blank'><img height='36' style='border:0px;height:36px;' src='https://cdn.ko-fi.com/cdn/kofi4.png?v=2' border='0' alt='Buy Me a Coffee at ko-fi.com'></a>
+                <a href='https://ko-fi.com/rintzezelle' target='_blank'><img height='36' style='border:0px;height:36px;' src='https://cdn.ko-fi.com/cdn/kofi1.png?v=2' border='0' alt='Buy Me a Coffee at ko-fi.com'></a>
               </div>
             </div>
           </div>
+          <br>
+          <div class="card bg-light">
+            <h5 class="card-header text-white bg-success">Other Tools</h5>
+            <div class="card-body">
+              <p class="card-text">My other web tools:</p>
+              <ul>
+                <li><a href="https://validator.citationstyles.org/" class="card-link">CSL Style and Locale Validator</a>
+                  <ul>
+                    <li><small>Check CSL files for correctness</small></li>
+                  </ul>        
+                </li>
+                <li><a href="https://formatter.citationstyles.org/" class="card-link">CSL Style Formatter</a>
+                  <ul>
+                    <li><small>Reformat CSL styles to repository standards</small></li>
+                  </ul>        
+                </li>       
+                <li><a href="https://rintze.zelle.me/dna-flip/" class="card-link">DNA-Flip</a>
+                  <ul>
+                    <li><small>Reverse-complement DNA and RNA sequences</small></li>
+                  </ul>
+                </li>
+              </ul>
+            </div>
+          </div>
         </div>
       </div>
     </div>