diff --git a/editions/tw5.com/tiddlers/plugins/CodeMirror Plugin.tid b/editions/tw5.com/tiddlers/plugins/CodeMirror Plugin.tid
index 82b830e9e..c4561e633 100644
--- a/editions/tw5.com/tiddlers/plugins/CodeMirror Plugin.tid	
+++ b/editions/tw5.com/tiddlers/plugins/CodeMirror Plugin.tid	
@@ -1,7 +1,7 @@
 created: 20160107223435497
 list: 
-modified: 20160107223725809
-tags: [[Plugin Editions]]
+modified: 20170228102537972
+tags: OfficialPlugins [[Plugin Editions]]
 title: CodeMirror Plugin
 type: text/vnd.tiddlywiki
 
diff --git a/editions/tw5.com/tiddlers/plugins/D3 Plugin.tid b/editions/tw5.com/tiddlers/plugins/D3 Plugin.tid
index 210be4f4e..ae29de3bc 100644
--- a/editions/tw5.com/tiddlers/plugins/D3 Plugin.tid	
+++ b/editions/tw5.com/tiddlers/plugins/D3 Plugin.tid	
@@ -1,7 +1,7 @@
 created: 20160107223425581
 list: 
-modified: 20160107223725807
-tags: [[Plugin Editions]]
+modified: 20170228102531138
+tags: OfficialPlugins [[Plugin Editions]]
 title: D3 Plugin
 type: text/vnd.tiddlywiki
 
diff --git a/editions/tw5.com/tiddlers/plugins/Highlight Plugin.tid b/editions/tw5.com/tiddlers/plugins/Highlight Plugin.tid
index d914cfd7c..853492405 100644
--- a/editions/tw5.com/tiddlers/plugins/Highlight Plugin.tid	
+++ b/editions/tw5.com/tiddlers/plugins/Highlight Plugin.tid	
@@ -1,7 +1,7 @@
 created: 20160107223417655
 list: 
-modified: 20160107223725805
-tags: [[Plugin Editions]]
+modified: 20170228102525208
+tags: OfficialPlugins [[Plugin Editions]]
 title: Highlight Plugin
 type: text/vnd.tiddlywiki
 
diff --git a/editions/tw5.com/tiddlers/plugins/KaTeX Plugin.tid b/editions/tw5.com/tiddlers/plugins/KaTeX Plugin.tid
index c76ae917c..aab696c55 100644
--- a/editions/tw5.com/tiddlers/plugins/KaTeX Plugin.tid	
+++ b/editions/tw5.com/tiddlers/plugins/KaTeX Plugin.tid	
@@ -1,7 +1,7 @@
 created: 20160107223410181
 list: 
-modified: 20160107223725803
-tags: [[Plugin Editions]]
+modified: 20170228102517666
+tags: OfficialPlugins [[Plugin Editions]]
 title: KaTeX Plugin
 type: text/vnd.tiddlywiki
 
diff --git a/editions/tw5.com/tiddlers/plugins/Markdown Plugin.tid b/editions/tw5.com/tiddlers/plugins/Markdown Plugin.tid
index f16ffbf98..41742ad9b 100644
--- a/editions/tw5.com/tiddlers/plugins/Markdown Plugin.tid	
+++ b/editions/tw5.com/tiddlers/plugins/Markdown Plugin.tid	
@@ -1,7 +1,7 @@
 created: 20160107223401584
 list: 
-modified: 20160107223725801
-tags: [[Plugin Editions]]
+modified: 20170228102511347
+tags: OfficialPlugins [[Plugin Editions]]
 title: Markdown Plugin
 type: text/vnd.tiddlywiki
 
diff --git a/editions/tw5.com/tiddlers/plugins/OfficialPlugins.tid b/editions/tw5.com/tiddlers/plugins/OfficialPlugins.tid
new file mode 100644
index 000000000..7ba5a258e
--- /dev/null
+++ b/editions/tw5.com/tiddlers/plugins/OfficialPlugins.tid
@@ -0,0 +1,9 @@
+created: 20170210075109635
+modified: 20170210075709809
+tags: Plugins
+title: OfficialPlugins
+type: text/vnd.tiddlywiki
+
+The official TiddlyWiki plugin library contains the plugins that are part of the [[main TiddlyWiki 5 GitHub repository|Working with the TiddlyWiki5 repository]]. Install them from [[the plugin library|Installing a plugin from the plugin library]]. Plugins from the official plugin library are automatically updated as part of the [[upgrade process|UpgradeMechanism]].
+
+<<list-links "[tag[OfficialPlugins]]">>
diff --git a/editions/tw5.com/tiddlers/plugins/Railroad Plugin.tid b/editions/tw5.com/tiddlers/plugins/Railroad Plugin.tid
index 288c9d50b..a08a7b8c3 100644
--- a/editions/tw5.com/tiddlers/plugins/Railroad Plugin.tid	
+++ b/editions/tw5.com/tiddlers/plugins/Railroad Plugin.tid	
@@ -1,7 +1,7 @@
 created: 20160107223348621
 list: 
-modified: 20160107223725798
-tags: [[Plugin Editions]]
+modified: 20170228102501706
+tags: OfficialPlugins [[Plugin Editions]]
 title: Railroad Plugin
 type: text/vnd.tiddlywiki
 
diff --git a/editions/tw5.com/tiddlers/plugins/SaveTrailPlugin.tid b/editions/tw5.com/tiddlers/plugins/SaveTrailPlugin.tid
new file mode 100644
index 000000000..94c30df08
--- /dev/null
+++ b/editions/tw5.com/tiddlers/plugins/SaveTrailPlugin.tid
@@ -0,0 +1,16 @@
+created: 20170210074840860
+modified: 20170210075100387
+tags: OfficialPlugins
+title: SaveTrailPlugin
+type: text/vnd.tiddlywiki
+
+This plugin causes TiddlyWiki to continuously download (as a JSON file) the contents of any tiddler that is manually changed by any of several means:
+
+* Confirming an edit
+* Deleting tiddlers
+* Imports
+* Renames/relinks
+* Optionally, typing in draft tiddlers can trigger a download
+
+Where appropriate, separate 'before' and 'after' files are downloaded. Configured correctly, the browser will download the files silently in the background, and they can be used as a backup in case of accidental data loss.
+
diff --git a/editions/tw5.com/tiddlers/plugins/TW2Parser Plugin.tid b/editions/tw5.com/tiddlers/plugins/TW2Parser Plugin.tid
index a2c473877..d14e609d7 100644
--- a/editions/tw5.com/tiddlers/plugins/TW2Parser Plugin.tid	
+++ b/editions/tw5.com/tiddlers/plugins/TW2Parser Plugin.tid	
@@ -1,7 +1,7 @@
 created: 20160107223340750
 list: 
-modified: 20160107223725794
-tags: [[Plugin Editions]]
+modified: 20170228102455677
+tags: OfficialPlugins [[Plugin Editions]]
 title: TW2Parser Plugin
 type: text/vnd.tiddlywiki
 
diff --git a/editions/tw5.com/tiddlers/plugins/TwitterPlugin.tid b/editions/tw5.com/tiddlers/plugins/TwitterPlugin.tid
new file mode 100644
index 000000000..b64333c1b
--- /dev/null
+++ b/editions/tw5.com/tiddlers/plugins/TwitterPlugin.tid
@@ -0,0 +1,11 @@
+created: 20170227223209558
+modified: 20170227223706297
+tags: OfficialPlugins
+title: TwitterPlugin
+type: text/vnd.tiddlywiki
+
+This plugin adds a `<$twitter>` widget that can embed a variety of entities from twitter.com:
+
+* Individual tweets and conversation threads
+* Buttons to tweet a hashtag/account, follow/like an account, or share a URL
+* Timelines showing tweets from a user, hashtag, list or collection