diff --git a/_templates/indexsidebar.html b/_templates/indexsidebar.html
index e3bbab24999..b178e030ffa 100644
--- a/_templates/indexsidebar.html
+++ b/_templates/indexsidebar.html
@@ -8,7 +8,7 @@ <h3>Navigation</h3>
 <a href="{{ pathto('documentation') }}" title="Documentation">Documentation</a><br>
 <a href="{{ pathto('faq') }}" title="FAQ">FAQ</a><br>
 <a href="{{ pathto('psc') }}" title="PSC">PSC</a><br>
-<a href="https://twitter.com/mapserver_osgeo" title="Twitter" target="_blank">Twitter</a>
+<a href="https://mastodon.social/@mapserver@fosstodon.org" title="Mastodon" target="_blank">Masstodon</a>
 </p>
 <a href="https://www.osgeo.org/" target="_blank">
     <img src="{{ pathto("_static/OSGeo_project.png", 1) }}" alt="OSGeo" border="0px; text-decoration:none" />
diff --git a/_templates/layout.html b/_templates/layout.html
index d96230f5e99..dd83779df3b 100644
--- a/_templates/layout.html
+++ b/_templates/layout.html
@@ -19,7 +19,7 @@ <h4 class="ribbon">DOCS PREVIEW</h4>
       <a href="https://github.com/mapserver/mapserver/issues/" title="Issue Tracker (MapServer core)">Issue Tracker</a> |
       <a href="{{ pathto('community/service_providers') }}" title="Professional Service Providers">Service Providers</a> |      
       <a href="{{ pathto('faq') }}" title="Frequently Asked Questions">FAQ</a> |
-      <a href="https://twitter.com/mapserver_osgeo" title="Twitter" target="_blank">Twitter</a> |
+      <a href="https://mastodon.social/@mapserver@fosstodon.org" title="Mastodon" target="_blank">Masstodon</a> |
       <a href="{{ pathto('download') }}" title="Download Source or Binaries">Download </a> |
       <a class="badge" href="https://www.paypal.com/cgi-bin/webscr?cmd=_s-xclick&hosted_button_id=KRJ2X44N3HA6U&source=url" target="_blank">
         <img src="https://img.shields.io/badge/donate-%E2%9D%A4%C2%A0-ff69b4.svg?style=flat" alt="Donate to MapServer">
diff --git a/_templates/sidebar2.html b/_templates/sidebar2.html
index 0a7f151958c..b4dcba059f8 100644
--- a/_templates/sidebar2.html
+++ b/_templates/sidebar2.html
@@ -8,5 +8,5 @@ <h3>Navigation</h3>
 <a href="{{ pathto('documentation') }}" title="Documentation">Documentation</a><br>
 <a href="{{ pathto('faq') }}" title="FAQ">FAQ</a><br>
 <a href="{{ pathto('psc') }}" title="PSC">PSC</a><br>
-<a href="https://twitter.com/mapserver_osgeo" title="Twitter">Twitter</a>
+<a href="https://mastodon.social/@mapserver@fosstodon.org" title="Mastodon">https://mastodon.social/@mapserver@fosstodon.org</a>
 </p>
diff --git a/en/input/vector/flatgeobuf.txt b/en/input/vector/flatgeobuf.txt
index 497b09fca48..9f43cc01829 100644
--- a/en/input/vector/flatgeobuf.txt
+++ b/en/input/vector/flatgeobuf.txt
@@ -31,10 +31,7 @@ chosen formats for streaming spatial data through HTTP / "the cloud".
 More Information
 ----------------
 
-More information about FlatGeobuf is available at:
-
-* GitHub repository: https://github.com/flatgeobuf/flatgeobuf
-* Twitter: https://twitter.com/flatgeobuf
+More information about FlatGeobuf is available at https://github.com/flatgeobuf/flatgeobuf
 
 File listing
 --------------
diff --git a/translated/ar/index.po b/translated/ar/index.po
index 5a57a12c86a..b3433a9faef 100644
--- a/translated/ar/index.po
+++ b/translated/ar/index.po
@@ -29,7 +29,7 @@ msgid "The MapServer :ref:`Project Steering Committee (PSC)<psc>`, sanctioned by
 msgstr ""
 
 #: ../../../en/index.txt:24
-msgid "Follow MapServer on `Twitter <https://twitter.com/mapserver_osgeo/>`__"
+msgid "Follow MapServer on `Fosstodon <https://fosstodon.org/@mapserver@fosstodon.org>`__"
 msgstr ""
 
 #: ../../../en/index.txt:26
diff --git a/translated/cs/index.po b/translated/cs/index.po
index 621180c40a1..cd2bbd74118 100644
--- a/translated/cs/index.po
+++ b/translated/cs/index.po
@@ -40,7 +40,7 @@ msgid ""
 msgstr ""
 
 #: ../../../en/index.txt:24
-msgid "Follow MapServer on `Twitter <https://twitter.com/mapserver_osgeo/>`__"
+msgid "Follow MapServer on `Fosstodon <https://fosstodon.org/@mapserver@fosstodon.org>`__"
 msgstr ""
 
 #: ../../../en/index.txt:26
diff --git a/translated/de/index.po b/translated/de/index.po
index 5a57a12c86a..b3433a9faef 100644
--- a/translated/de/index.po
+++ b/translated/de/index.po
@@ -29,7 +29,7 @@ msgid "The MapServer :ref:`Project Steering Committee (PSC)<psc>`, sanctioned by
 msgstr ""
 
 #: ../../../en/index.txt:24
-msgid "Follow MapServer on `Twitter <https://twitter.com/mapserver_osgeo/>`__"
+msgid "Follow MapServer on `Fosstodon <https://fosstodon.org/@mapserver@fosstodon.org>`__"
 msgstr ""
 
 #: ../../../en/index.txt:26
diff --git a/translated/el/index.po b/translated/el/index.po
index 5a57a12c86a..b3433a9faef 100644
--- a/translated/el/index.po
+++ b/translated/el/index.po
@@ -29,7 +29,7 @@ msgid "The MapServer :ref:`Project Steering Committee (PSC)<psc>`, sanctioned by
 msgstr ""
 
 #: ../../../en/index.txt:24
-msgid "Follow MapServer on `Twitter <https://twitter.com/mapserver_osgeo/>`__"
+msgid "Follow MapServer on `Fosstodon <https://fosstodon.org/@mapserver@fosstodon.org>`__"
 msgstr ""
 
 #: ../../../en/index.txt:26
diff --git a/translated/es/index.po b/translated/es/index.po
index 5a57a12c86a..b3433a9faef 100644
--- a/translated/es/index.po
+++ b/translated/es/index.po
@@ -29,7 +29,7 @@ msgid "The MapServer :ref:`Project Steering Committee (PSC)<psc>`, sanctioned by
 msgstr ""
 
 #: ../../../en/index.txt:24
-msgid "Follow MapServer on `Twitter <https://twitter.com/mapserver_osgeo/>`__"
+msgid "Follow MapServer on `Fosstodon <https://fosstodon.org/@mapserver@fosstodon.org>`__"
 msgstr ""
 
 #: ../../../en/index.txt:26
diff --git a/translated/fr/index.po b/translated/fr/index.po
index 5a57a12c86a..b3433a9faef 100644
--- a/translated/fr/index.po
+++ b/translated/fr/index.po
@@ -29,7 +29,7 @@ msgid "The MapServer :ref:`Project Steering Committee (PSC)<psc>`, sanctioned by
 msgstr ""
 
 #: ../../../en/index.txt:24
-msgid "Follow MapServer on `Twitter <https://twitter.com/mapserver_osgeo/>`__"
+msgid "Follow MapServer on `Fosstodon <https://fosstodon.org/@mapserver@fosstodon.org>`__"
 msgstr ""
 
 #: ../../../en/index.txt:26
diff --git a/translated/id/index.po b/translated/id/index.po
index 5a57a12c86a..b3433a9faef 100644
--- a/translated/id/index.po
+++ b/translated/id/index.po
@@ -29,7 +29,7 @@ msgid "The MapServer :ref:`Project Steering Committee (PSC)<psc>`, sanctioned by
 msgstr ""
 
 #: ../../../en/index.txt:24
-msgid "Follow MapServer on `Twitter <https://twitter.com/mapserver_osgeo/>`__"
+msgid "Follow MapServer on `Fosstodon <https://fosstodon.org/@mapserver@fosstodon.org>`__"
 msgstr ""
 
 #: ../../../en/index.txt:26
diff --git a/translated/it/index.po b/translated/it/index.po
index 5a57a12c86a..b3433a9faef 100644
--- a/translated/it/index.po
+++ b/translated/it/index.po
@@ -29,7 +29,7 @@ msgid "The MapServer :ref:`Project Steering Committee (PSC)<psc>`, sanctioned by
 msgstr ""
 
 #: ../../../en/index.txt:24
-msgid "Follow MapServer on `Twitter <https://twitter.com/mapserver_osgeo/>`__"
+msgid "Follow MapServer on `Fosstodon <https://fosstodon.org/@mapserver@fosstodon.org>`__"
 msgstr ""
 
 #: ../../../en/index.txt:26
diff --git a/translated/ja/index.po b/translated/ja/index.po
index 5a57a12c86a..b3433a9faef 100644
--- a/translated/ja/index.po
+++ b/translated/ja/index.po
@@ -29,7 +29,7 @@ msgid "The MapServer :ref:`Project Steering Committee (PSC)<psc>`, sanctioned by
 msgstr ""
 
 #: ../../../en/index.txt:24
-msgid "Follow MapServer on `Twitter <https://twitter.com/mapserver_osgeo/>`__"
+msgid "Follow MapServer on `Fosstodon <https://fosstodon.org/@mapserver@fosstodon.org>`__"
 msgstr ""
 
 #: ../../../en/index.txt:26
diff --git a/translated/nl_NL/index.po b/translated/nl_NL/index.po
index 5a57a12c86a..b3433a9faef 100644
--- a/translated/nl_NL/index.po
+++ b/translated/nl_NL/index.po
@@ -29,7 +29,7 @@ msgid "The MapServer :ref:`Project Steering Committee (PSC)<psc>`, sanctioned by
 msgstr ""
 
 #: ../../../en/index.txt:24
-msgid "Follow MapServer on `Twitter <https://twitter.com/mapserver_osgeo/>`__"
+msgid "Follow MapServer on `Fosstodon <https://fosstodon.org/@mapserver@fosstodon.org>`__"
 msgstr ""
 
 #: ../../../en/index.txt:26
diff --git a/translated/pl/index.po b/translated/pl/index.po
index 5a57a12c86a..b3433a9faef 100644
--- a/translated/pl/index.po
+++ b/translated/pl/index.po
@@ -29,7 +29,7 @@ msgid "The MapServer :ref:`Project Steering Committee (PSC)<psc>`, sanctioned by
 msgstr ""
 
 #: ../../../en/index.txt:24
-msgid "Follow MapServer on `Twitter <https://twitter.com/mapserver_osgeo/>`__"
+msgid "Follow MapServer on `Fosstodon <https://fosstodon.org/@mapserver@fosstodon.org>`__"
 msgstr ""
 
 #: ../../../en/index.txt:26
diff --git a/translated/pt/index.po b/translated/pt/index.po
index b0ccc585292..2aaad65528a 100644
--- a/translated/pt/index.po
+++ b/translated/pt/index.po
@@ -40,7 +40,7 @@ msgid ""
 msgstr ""
 
 #: ../../../en/index.txt:24
-msgid "Follow MapServer on `Twitter <https://twitter.com/mapserver_osgeo/>`__"
+msgid "Follow MapServer on `Fosstodon <https://fosstodon.org/@mapserver@fosstodon.org>`__"
 msgstr ""
 
 #: ../../../en/index.txt:26
diff --git a/translated/pt_PT/index.po b/translated/pt_PT/index.po
index 0f26b94bb61..7baffad97c7 100644
--- a/translated/pt_PT/index.po
+++ b/translated/pt_PT/index.po
@@ -40,7 +40,7 @@ msgid ""
 msgstr ""
 
 #: ../../../en/index.txt:24
-msgid "Follow MapServer on `Twitter <https://twitter.com/mapserver_osgeo/>`__"
+msgid "Follow MapServer on `Fosstodon <https://fosstodon.org/@mapserver@fosstodon.org>`__"
 msgstr ""
 
 #: ../../../en/index.txt:26
diff --git a/translated/ru/index.po b/translated/ru/index.po
index 5a57a12c86a..b3433a9faef 100644
--- a/translated/ru/index.po
+++ b/translated/ru/index.po
@@ -29,7 +29,7 @@ msgid "The MapServer :ref:`Project Steering Committee (PSC)<psc>`, sanctioned by
 msgstr ""
 
 #: ../../../en/index.txt:24
-msgid "Follow MapServer on `Twitter <https://twitter.com/mapserver_osgeo/>`__"
+msgid "Follow MapServer on `Fosstodon <https://fosstodon.org/@mapserver@fosstodon.org>`__"
 msgstr ""
 
 #: ../../../en/index.txt:26
diff --git a/translated/sq/index.po b/translated/sq/index.po
index 5a57a12c86a..b3433a9faef 100644
--- a/translated/sq/index.po
+++ b/translated/sq/index.po
@@ -29,7 +29,7 @@ msgid "The MapServer :ref:`Project Steering Committee (PSC)<psc>`, sanctioned by
 msgstr ""
 
 #: ../../../en/index.txt:24
-msgid "Follow MapServer on `Twitter <https://twitter.com/mapserver_osgeo/>`__"
+msgid "Follow MapServer on `Fosstodon <https://fosstodon.org/@mapserver@fosstodon.org>`__"
 msgstr ""
 
 #: ../../../en/index.txt:26
diff --git a/translated/tr/index.po b/translated/tr/index.po
index 5a57a12c86a..b3433a9faef 100644
--- a/translated/tr/index.po
+++ b/translated/tr/index.po
@@ -29,7 +29,7 @@ msgid "The MapServer :ref:`Project Steering Committee (PSC)<psc>`, sanctioned by
 msgstr ""
 
 #: ../../../en/index.txt:24
-msgid "Follow MapServer on `Twitter <https://twitter.com/mapserver_osgeo/>`__"
+msgid "Follow MapServer on `Fosstodon <https://fosstodon.org/@mapserver@fosstodon.org>`__"
 msgstr ""
 
 #: ../../../en/index.txt:26
diff --git a/translated/uk/index.po b/translated/uk/index.po
index 6914e2b0de1..b90f5adb1c7 100644
--- a/translated/uk/index.po
+++ b/translated/uk/index.po
@@ -40,7 +40,7 @@ msgid ""
 msgstr ""
 
 #: ../../../en/index.txt:24
-msgid "Follow MapServer on `Twitter <https://twitter.com/mapserver_osgeo/>`__"
+msgid "Follow MapServer on `Fosstodon <https://fosstodon.org/@mapserver@fosstodon.org>`__"
 msgstr ""
 
 #: ../../../en/index.txt:26
diff --git a/translated/zh/index.po b/translated/zh/index.po
index 934695f94aa..1d7146c0662 100644
--- a/translated/zh/index.po
+++ b/translated/zh/index.po
@@ -41,7 +41,7 @@ msgid ""
 msgstr ""
 
 #: ../../../en/index.txt:24
-msgid "Follow MapServer on `Twitter <https://twitter.com/mapserver_osgeo/>`__"
+msgid "Follow MapServer on `Fosstodon <https://fosstodon.org/@mapserver@fosstodon.org>`__"
 msgstr ""
 
 #: ../../../en/index.txt:26