provide syntax based [colour] highlighting on code blocks for popular languages. I'm not happy with the line height on the list elements but couldn't see where this was defaulted. This uses the syntax [code=xxx]some code snippet[/code], where xxx represents a code/language style - with about 18 builtins.

library/Text_Highlighter/sample.css

@@ -0,0 +1,65 @@
+.hl-main ol {
+	line-height: 1.0;
+}
+.hl-main li {
+}
+
+.hl-default {
+    color: Black;
+}
+.hl-code {
+    color: Black;
+}
+.hl-brackets {
+    color: Olive;
+}
+.hl-comment {
+    color: Orange;
+}
+.hl-quotes {
+    color: Darkred;
+}
+.hl-string {
+    color: Red;
+}
+.hl-identifier {
+    color: Blue;
+}
+.hl-builtin {
+    color: Teal;
+}
+.hl-reserved {
+    color: Green;
+}
+.hl-inlinedoc {
+    color: Blue;
+}
+.hl-var {
+    color: Darkblue;
+}
+.hl-url {
+    color: Blue;
+}
+.hl-special {
+    color: Navy;
+}
+.hl-number {
+    color: Maroon;
+}
+.hl-inlinetags {
+    color: Blue;
+}
+.hl-main {
+	background: #ccc none repeat scroll 0 0;
+    color: #000;
+/*    background-color: White; */
+}
+.hl-gutter {
+    background-color: #999999;
+    color: White
+}
+.hl-table {
+    font-family: courier;
+    font-size: 12px;
+    border: solid 1px Lightgrey;
+}