diff --git a/TODO.md b/TODO.md
index 7ece859..c1c8f72 100644
--- a/TODO.md
+++ b/TODO.md
@@ -4,6 +4,11 @@ A list of open source services to be created
 
 ## Services
 
+- blog - a simple blogging service
+  - posts
+  - comments
+  - tags
 - inbox - a simple inbox for mail and private messages
   * messages - store the messages for the inbox
   * notifications - holds updates and alerts
+- users - manages user accounts and login