Added DB2 SQL, Gri, ici, Icon, J, Jade, Jason, Jess, K, LSL, M4, MEL, QuakeC, Qore, Simula, SMIL, SVG, UniComal, unlambda, VRML, VML, WSH, XBase++, XLogo, XPL0, XSLT, XUL and ZIM

x/xbase++.prg

@@ -0,0 +1,3 @@
+func Main()
+    Qout("Hello World")
+return 1

x/xlogo.lgo

@@ -0,0 +1,53 @@
+to HelloWorld
+ resetall
+ hideturtle
+ fd 20 left 180
+ fd 40 left 180
+ fd 20 right 90
+ fd 20 left 90
+ fd 20 left 180
+ fd 40 left 90
+ fd 20 left 90
+ fd 20 right 90
+ fd 20 right 90
+ fd 10 right 90
+ fd 20 left 90
+ fd 10 left 90
+ fd 30 left 90
+ fd 40 left 180
+ fd 40 left 90
+ fd 20 left 90
+ fd 40 left 180
+ fd 40 left 90
+ fd 40 left 90
+ fd 20 left 90
+ fd 20 left 90
+ fd 20 left 90
+ fd 60 left 90
+ fd 40 left 180
+ fd 40 left 90
+ fd 20 left 90
+ fd 20 left 180
+ fd 20 left 90
+ fd 20 left 90
+ fd 40 left 180
+ fd 40 left 90
+ fd 40 left 90
+ fd 20 left 90
+ fd 20 left 90
+ fd 20 left 90
+ fd 40 left 90
+ fd 20 right 90
+ fd 20 right 90
+ fd 5  left 90  
+ fd 5  left 90  
+ fd 25 left 180
+ fd 40 left 90
+ fd 40 left 90
+ fd 20 left 90
+ fd 20 left 90
+ fd 20 left 90
+ fd 20 left 90
+ fd 40 left 180
+ fd 40
+end

x/xpl0.xpl

@@ -0,0 +1,2 @@
+code Text=12;
+Text(0, "Hello World")

x/xslt.xslt

@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
+    <xsl:template match="/">
+        <xsl:text>Hello World!</xsl:text>
+    </xsl:template>
+</xsl:stylesheet>

x/xul.xul

@@ -0,0 +1,4 @@
+<?xml version="1.0"?>
+<window xmlns="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul">
+    <label value="Hello World"/>
+</window>