diff --git a/static/images/logo/zballoon.png b/static/images/logo/zballoon.png
new file mode 100644
index 0000000000..7aeee6646c
Binary files /dev/null and b/static/images/logo/zballoon.png differ
diff --git a/static/styles/portico.css b/static/styles/portico.css
index 1e551d960a..1f81fee8b8 100644
--- a/static/styles/portico.css
+++ b/static/styles/portico.css
@@ -261,6 +261,11 @@ input.text-error {
     padding: 6px 0px 6px 0px;
  }
 
+ .header-main .portico-simple-logo {
+    height: 40px;
+    width: auto;
+ }
+
  .app {
     width: 100%;
     z-index: 99;
@@ -697,12 +702,50 @@ a.bottom-signup-button {
     margin-left: 10px;
 }
 
-.main-headline-container {
+.main-headline-container,
+.os-headline-container {
     position: relative;
     height: 100%;
     padding-top: 40px !important;
 }
 
+.os-headline-container {
+    padding: 20px;
+    background: #1e5799;
+    background: linear-gradient(to bottom, #1e5799 0%,#2989d8 52%,#7db9e8 100%);
+    padding-bottom: 40px !important;
+    text-align: center;
+}
+
+.os-tagline,
+.os-footnote {
+    color: #eeeeee !important;
+}
+
+.os-footnote a:link,
+.os-footnote a:visited,
+.os-footnote a:active {
+    color: #eeeeee;
+    text-decoration: none;
+    border-bottom: 1px solid #dddddd;
+}
+
+.os-footnote a:hover {
+    color: #ffffff;
+    text-decoration: none;
+    border-bottom: 1px solid #ffffff;
+}
+
+.os-illustration {
+    height: 200px;
+    width: auto;
+    margin-bottom: 15px;
+}
+
+.portico-os-announcement {
+    padding-top: 40px;
+}
+
 .main-headline-logo {
     display: block;
     width: 200px;
@@ -759,7 +802,7 @@ a.bottom-signup-button {
 .hello-main {
     max-width: none;
     min-width: 0;
-    padding: 0;
+    padding: 0 !important;
 }
 
 .footer-padder {
diff --git a/templates/zerver/hello.html b/templates/zerver/hello.html
index 0e6c100761..8b0bbc5477 100644
--- a/templates/zerver/hello.html
+++ b/templates/zerver/hello.html
@@ -1,6 +1,22 @@
 {% extends "zerver/portico.html" %}
 {% block hello_page_container %} hello-main{% endblock %}
 {% block hello_page_footer %} hello-footer{% endblock %}
+{% block os_announcement %}
+  {% if zulip_com %}
+  <div class="os-headline-container">
+    <img src="/static/images/logo/zballoon.png" class="os-illustration" alt="Zulip balloon" />
+    <div class="main-headline-text">
+      <span class="tagline os-tagline">
+         Zulip has been released as open source software!
+      </span>
+      <span class="footnote os-footnote">
+         Read the <a href="https://blogs.dropbox.com/tech/2015/09/open-sourcing-zulip-a-dropbox-hack-week-project" target="_blank">announcement</a> or go to <a href="https://www.zulip.org" target="_blank">the Zulip open source project website</a>.
+      </span>
+    </div>
+  </div>
+  {% endif %}
+{% endblock %}
+
 {% block portico_content %}
 <div class="app main-headline">
   <div class="app-main main-headline-container">
diff --git a/templates/zerver/integrations.html b/templates/zerver/integrations.html
index e5cb37eeed..ece89d8966 100644
--- a/templates/zerver/integrations.html
+++ b/templates/zerver/integrations.html
@@ -2,6 +2,22 @@
 
 {# API information page #}
 
+{% block os_announcement %}
+  {% if zulip_com %}
+  <div class="os-headline-container">
+    <img src="/static/images/logo/zballoon.png" class="os-illustration" alt="Zulip balloon" />
+    <div class="main-headline-text">
+      <span class="tagline os-tagline">
+         Zulip has been released as open source software!
+      </span>
+      <span class="footnote os-footnote">
+         Read the <a href="https://blogs.dropbox.com/tech/2015/09/open-sourcing-zulip-a-dropbox-hack-week-project" target="_blank">announcement</a> or go to <a href="https://www.zulip.org" target="_blank">the Zulip open source project website</a>.
+      </span>
+    </div>
+  </div>
+  {% endif %}
+{% endblock %}
+
 {% block portico_content %}
 
     <div class="portico-page-header"><a href="#"><i class="icon-vector-gears portico-page-header-icon"></i>Integrations</a></div>
diff --git a/templates/zerver/login.html b/templates/zerver/login.html
index 5c15eb4012..577b45d209 100644
--- a/templates/zerver/login.html
+++ b/templates/zerver/login.html
@@ -9,6 +9,22 @@
     {% minified_js 'signup' %}
 {% endblock %}
 
+{% block os_announcement %}
+  {% if zulip_com %}
+  <div class="os-headline-container">
+    <img src="/static/images/logo/zballoon.png" class="os-illustration" alt="Zulip balloon" />
+    <div class="main-headline-text">
+      <span class="tagline os-tagline">
+         Zulip has been released as open source software!
+      </span>
+      <span class="footnote os-footnote">
+         Read the <a href="https://blogs.dropbox.com/tech/2015/09/open-sourcing-zulip-a-dropbox-hack-week-project" target="_blank">announcement</a> or go to <a href="https://www.zulip.org" target="_blank">the Zulip open source project website</a>.
+      </span>
+    </div>
+  </div>
+  {% endif %}
+{% endblock %}
+
 {% block portico_content %}
 
 {% if password_auth_enabled %}
diff --git a/templates/zerver/portico.html b/templates/zerver/portico.html
index c3d7762647..73129586b5 100644
--- a/templates/zerver/portico.html
+++ b/templates/zerver/portico.html
@@ -21,7 +21,7 @@ hence the name.
           {% if zulip_com %}
           <a class="brand logo" href="/"><img src="/static/images/logo/zulip-dropbox.png" class="portico-logo" alt="Zulip" content="Zulip" /></a>
           {% else %}
-          <a class="brand logo" href="/"><img src="/static/images/logo/zulipwlogo@2x.png" class="portico-logo" alt="Zulip" content="Zulip" /></a>
+          <a class="brand logo" href="/"><img src="/static/images/logo/zulipcornerlogo@2x.png" class="portico-simple-logo" alt="Zulip" content="Zulip" /></a>
           {% endif %}
         </div>
   </div>
@@ -41,6 +41,10 @@ hence the name.
 </div>
 
 <div class="app portico-page">
+  <div class="portico-os-announcement">
+    {% block os_announcement %}
+    {% endblock %}
+  </div>
   <div class="app-main portico-page-container{% block hello_page_container %}{% endblock %}">
   {% block portico_content %}
   {% endblock %}