diff --git a/drivers/bookmarklet/images/icons/Rack::Cache.png b/drivers/bookmarklet/images/icons/Rack::Cache.png
new file mode 100644
index 000000000..67c4b8a23
Binary files /dev/null and b/drivers/bookmarklet/images/icons/Rack::Cache.png differ
diff --git a/drivers/bookmarklet/js/apps.js b/drivers/bookmarklet/js/apps.js
index d9c061487..bd6db07c0 100644
--- a/drivers/bookmarklet/js/apps.js
+++ b/drivers/bookmarklet/js/apps.js
@@ -1053,7 +1053,7 @@
 			cats: [ 6 ],
 			html: /<body onload=("|')window\.defaultStatus='oscss templates';("|')/i
 		},
-		'Outbrain': { 
+		'Outbrain': {
 		    cats:    [ 5 ],
 		    html: 	/var OB_langJS = 'http\:\/\/widgets\.outbrain\.com\/lang_/,
 		    script: /http\:\/\/widgets\.outbrain\.com\/outbrain\.js/,
@@ -1194,6 +1194,11 @@
 			cats: [ 6 ],
 			html: /<a href="[^>]+opensolution\.org\/">Powered by/i
 		},
+		'Rack::Cache': {
+			cats: [ 23 ],
+			headers: { 'X-Rack-Cache': /.+/ },
+			implies: [ 'Ruby' ]
+		},
 		'Raphael': {
 			cats: [ 25 ],
 			script: /raphael.*\.js/,
@@ -1374,7 +1379,7 @@
 			cats: [ 6 ],
 			html: /Shopsystem von <a href="http:\/\/www\.store-systems\.de"|\.mws_boxTop/
 		},
-		'SublimeVideo': { 
+		'SublimeVideo': {
 		    cats:    [ 14, 31 ],
 		    script:  /http\:\/\/cdn\.sublimevideo\.net\/js\/[a-z0-9]+\.js/,
 		    env:     /^sublimevideo$/
diff --git a/drivers/chrome/images/icons/Rack::Cache.png b/drivers/chrome/images/icons/Rack::Cache.png
new file mode 100644
index 000000000..67c4b8a23
Binary files /dev/null and b/drivers/chrome/images/icons/Rack::Cache.png differ
diff --git a/drivers/chrome/js/apps.js b/drivers/chrome/js/apps.js
index d9c061487..bd6db07c0 100644
--- a/drivers/chrome/js/apps.js
+++ b/drivers/chrome/js/apps.js
@@ -1053,7 +1053,7 @@
 			cats: [ 6 ],
 			html: /<body onload=("|')window\.defaultStatus='oscss templates';("|')/i
 		},
-		'Outbrain': { 
+		'Outbrain': {
 		    cats:    [ 5 ],
 		    html: 	/var OB_langJS = 'http\:\/\/widgets\.outbrain\.com\/lang_/,
 		    script: /http\:\/\/widgets\.outbrain\.com\/outbrain\.js/,
@@ -1194,6 +1194,11 @@
 			cats: [ 6 ],
 			html: /<a href="[^>]+opensolution\.org\/">Powered by/i
 		},
+		'Rack::Cache': {
+			cats: [ 23 ],
+			headers: { 'X-Rack-Cache': /.+/ },
+			implies: [ 'Ruby' ]
+		},
 		'Raphael': {
 			cats: [ 25 ],
 			script: /raphael.*\.js/,
@@ -1374,7 +1379,7 @@
 			cats: [ 6 ],
 			html: /Shopsystem von <a href="http:\/\/www\.store-systems\.de"|\.mws_boxTop/
 		},
-		'SublimeVideo': { 
+		'SublimeVideo': {
 		    cats:    [ 14, 31 ],
 		    script:  /http\:\/\/cdn\.sublimevideo\.net\/js\/[a-z0-9]+\.js/,
 		    env:     /^sublimevideo$/
diff --git a/drivers/firefox/content/js/apps.js b/drivers/firefox/content/js/apps.js
index d9c061487..bd6db07c0 100644
--- a/drivers/firefox/content/js/apps.js
+++ b/drivers/firefox/content/js/apps.js
@@ -1053,7 +1053,7 @@
 			cats: [ 6 ],
 			html: /<body onload=("|')window\.defaultStatus='oscss templates';("|')/i
 		},
-		'Outbrain': { 
+		'Outbrain': {
 		    cats:    [ 5 ],
 		    html: 	/var OB_langJS = 'http\:\/\/widgets\.outbrain\.com\/lang_/,
 		    script: /http\:\/\/widgets\.outbrain\.com\/outbrain\.js/,
@@ -1194,6 +1194,11 @@
 			cats: [ 6 ],
 			html: /<a href="[^>]+opensolution\.org\/">Powered by/i
 		},
+		'Rack::Cache': {
+			cats: [ 23 ],
+			headers: { 'X-Rack-Cache': /.+/ },
+			implies: [ 'Ruby' ]
+		},
 		'Raphael': {
 			cats: [ 25 ],
 			script: /raphael.*\.js/,
@@ -1374,7 +1379,7 @@
 			cats: [ 6 ],
 			html: /Shopsystem von <a href="http:\/\/www\.store-systems\.de"|\.mws_boxTop/
 		},
-		'SublimeVideo': { 
+		'SublimeVideo': {
 		    cats:    [ 14, 31 ],
 		    script:  /http\:\/\/cdn\.sublimevideo\.net\/js\/[a-z0-9]+\.js/,
 		    env:     /^sublimevideo$/
diff --git a/drivers/firefox/skin/images/icons/Rack::Cache.png b/drivers/firefox/skin/images/icons/Rack::Cache.png
new file mode 100644
index 000000000..67c4b8a23
Binary files /dev/null and b/drivers/firefox/skin/images/icons/Rack::Cache.png differ
diff --git a/drivers/html/images/icons/Rack::Cache.png b/drivers/html/images/icons/Rack::Cache.png
new file mode 100644
index 000000000..67c4b8a23
Binary files /dev/null and b/drivers/html/images/icons/Rack::Cache.png differ
diff --git a/drivers/html/js/apps.js b/drivers/html/js/apps.js
index d9c061487..bd6db07c0 100644
--- a/drivers/html/js/apps.js
+++ b/drivers/html/js/apps.js
@@ -1053,7 +1053,7 @@
 			cats: [ 6 ],
 			html: /<body onload=("|')window\.defaultStatus='oscss templates';("|')/i
 		},
-		'Outbrain': { 
+		'Outbrain': {
 		    cats:    [ 5 ],
 		    html: 	/var OB_langJS = 'http\:\/\/widgets\.outbrain\.com\/lang_/,
 		    script: /http\:\/\/widgets\.outbrain\.com\/outbrain\.js/,
@@ -1194,6 +1194,11 @@
 			cats: [ 6 ],
 			html: /<a href="[^>]+opensolution\.org\/">Powered by/i
 		},
+		'Rack::Cache': {
+			cats: [ 23 ],
+			headers: { 'X-Rack-Cache': /.+/ },
+			implies: [ 'Ruby' ]
+		},
 		'Raphael': {
 			cats: [ 25 ],
 			script: /raphael.*\.js/,
@@ -1374,7 +1379,7 @@
 			cats: [ 6 ],
 			html: /Shopsystem von <a href="http:\/\/www\.store-systems\.de"|\.mws_boxTop/
 		},
-		'SublimeVideo': { 
+		'SublimeVideo': {
 		    cats:    [ 14, 31 ],
 		    script:  /http\:\/\/cdn\.sublimevideo\.net\/js\/[a-z0-9]+\.js/,
 		    env:     /^sublimevideo$/
diff --git a/drivers/php/js/apps.js b/drivers/php/js/apps.js
index d9c061487..bd6db07c0 100644
--- a/drivers/php/js/apps.js
+++ b/drivers/php/js/apps.js
@@ -1053,7 +1053,7 @@
 			cats: [ 6 ],
 			html: /<body onload=("|')window\.defaultStatus='oscss templates';("|')/i
 		},
-		'Outbrain': { 
+		'Outbrain': {
 		    cats:    [ 5 ],
 		    html: 	/var OB_langJS = 'http\:\/\/widgets\.outbrain\.com\/lang_/,
 		    script: /http\:\/\/widgets\.outbrain\.com\/outbrain\.js/,
@@ -1194,6 +1194,11 @@
 			cats: [ 6 ],
 			html: /<a href="[^>]+opensolution\.org\/">Powered by/i
 		},
+		'Rack::Cache': {
+			cats: [ 23 ],
+			headers: { 'X-Rack-Cache': /.+/ },
+			implies: [ 'Ruby' ]
+		},
 		'Raphael': {
 			cats: [ 25 ],
 			script: /raphael.*\.js/,
@@ -1374,7 +1379,7 @@
 			cats: [ 6 ],
 			html: /Shopsystem von <a href="http:\/\/www\.store-systems\.de"|\.mws_boxTop/
 		},
-		'SublimeVideo': { 
+		'SublimeVideo': {
 		    cats:    [ 14, 31 ],
 		    script:  /http\:\/\/cdn\.sublimevideo\.net\/js\/[a-z0-9]+\.js/,
 		    env:     /^sublimevideo$/
diff --git a/share/images/icons/Rack::Cache.png b/share/images/icons/Rack::Cache.png
new file mode 100644
index 000000000..67c4b8a23
Binary files /dev/null and b/share/images/icons/Rack::Cache.png differ
diff --git a/share/js/apps.js b/share/js/apps.js
index 9bf3f5ccd..bd6db07c0 100644
--- a/share/js/apps.js
+++ b/share/js/apps.js
@@ -1053,7 +1053,7 @@
 			cats: [ 6 ],
 			html: /<body onload=("|')window\.defaultStatus='oscss templates';("|')/i
 		},
-		'Outbrain': { 
+		'Outbrain': {
 		    cats:    [ 5 ],
 		    html: 	/var OB_langJS = 'http\:\/\/widgets\.outbrain\.com\/lang_/,
 		    script: /http\:\/\/widgets\.outbrain\.com\/outbrain\.js/,
@@ -1195,7 +1195,7 @@
 			html: /<a href="[^>]+opensolution\.org\/">Powered by/i
 		},
 		'Rack::Cache': {
-			cats: [ 22 ],
+			cats: [ 23 ],
 			headers: { 'X-Rack-Cache': /.+/ },
 			implies: [ 'Ruby' ]
 		},
@@ -1379,7 +1379,7 @@
 			cats: [ 6 ],
 			html: /Shopsystem von <a href="http:\/\/www\.store-systems\.de"|\.mws_boxTop/
 		},
-		'SublimeVideo': { 
+		'SublimeVideo': {
 		    cats:    [ 14, 31 ],
 		    script:  /http\:\/\/cdn\.sublimevideo\.net\/js\/[a-z0-9]+\.js/,
 		    env:     /^sublimevideo$/
