diff --git a/README.md b/README.md
index 2979c5f4..8f6f8504 100644
--- a/README.md
+++ b/README.md
@@ -14,20 +14,20 @@ Table of Contents
   - [Blogging Platforms](#blogging-platforms)
   - [Bookmarks & Link Sharing](#bookmarks--link-sharing)
   - [Calendar and Address Books](#calendar-and-address-books)
-  - [Communication systems](#communication-systems)
+  - [Communication Systems](#communication-systems)
+    - [Custom](#custom)
     - [Email](#email)
-      - [Webmail clients](#webmail-clients)
-      - [Mail Transfer Agents](#mail-transfer-agents)
-      - [Mail Delivery Agents](#mail-delivery-agents)
       - [Complete solutions](#complete-solutions)
-      - [Mailing lists](#mailing-lists)
+      - [Mailing Lists](#mailing-lists)
+      - [Mail Delivery Agents](#mail-delivery-agents)
+      - [Mail Transfer Agents](#mail-transfer-agents)
+      - [Webmail Clients](#webmail-clients)
+    - [IRC](#irc)
+    - [SIP](#sip)
+    - [Social Networks and Forums](#social-networks-and-forums)
     - [XMPP](#xmpp)
       - [XMPP Servers](#xmpp-servers)
       - [XMPP Web Clients](#xmpp-web-clients)
-    - [SIP](#sip)
-    - [IRC](#irc)
-    - [Custom](#custom)
-    - [Social Networks and Forums](#social-networks-and-forums)
   - [Content Management Systems (CMS)](#content-management-systems-cms)
     - [E-commerce](#e-commerce)
   - [Document Archiving](#document-archiving)