diff --git a/cow/Makefile b/cow/Makefile
new file mode 100755
index 0000000..f43e61d
--- /dev/null
+++ b/cow/Makefile
@@ -0,0 +1,10 @@
+MAIN = cow
+CFLAGS = -I/usr/include/libxml2
+LDFLAGS = $(CFLAGS) -lxml2 -lxslt
+SOURCES = $(wildcard *.c)
+OBJECTS = $(SOURCES:.c=.o)
+
+all: $(MAIN)
+
+$(MAIN): $(OBJECTS)
+	$(CC) $(LDFLAGS) -o $@ $(OBJECTS)
diff --git a/cow/main.c b/cow/main.c
new file mode 100755
index 0000000..6c4a514
--- /dev/null
+++ b/cow/main.c
@@ -0,0 +1,79 @@
+#include <stdio.h>
+#include <libxml/xmlmemory.h>
+#include <libxml/debugXML.h>
+#include <libxml/HTMLtree.h>
+#include <libxml/xmlIO.h>
+#include <libxml/DOCBparser.h>
+#include <libxml/xinclude.h>
+#include <libxml/catalog.h>
+#include <libxslt/xslt.h>
+#include <libxslt/xsltInternals.h>
+#include <libxslt/transform.h>
+#include <libxslt/xsltutils.h>
+
+extern int xmlLoadExtDtdDefaultValue;
+
+// output usage message. progname is the name of the executable.
+static void usage(const char* progname)
+{
+  printf("Usage: %s [options] stylesheet input\n", progname);
+  printf("      --param name value : pass a parameter to the stylesheet\n");
+}
+
+int main(int argc, char** argv)
+{
+  int argNum;
+  const char **params = 0;
+  int maxparams = 0;
+  int nbparams = 0;
+  xsltStylesheetPtr cur = NULL;
+  xmlDocPtr doc, res;
+  
+  maxparams = 16;
+  params = (const char**)malloc(sizeof(char*) * maxparams * 2);
+  
+  if (argc <= 1) {
+    usage(argv[0]);
+    return 1;
+  }
+
+  for (argNum = 1; argNum < argc; argNum++) {
+    if (argv[argNum][0] != '-')
+      break;
+    if ((!strcmp(argv[argNum], "-param")) ||
+        (!strcmp(argv[argNum], "--param"))) {
+      argNum++;
+      params[nbparams++] = argv[argNum++];
+      params[nbparams++] = argv[argNum];
+      if (nbparams >= maxparams * 2) {
+        maxparams *= 2;
+        params = realloc(params, sizeof(char*) * maxparams * 2);
+      }
+    }  else {
+      fprintf(stderr, "Unknown option %s\n", argv[argNum]);
+      usage(argv[0]);
+      return 1;
+    }
+  }
+  if (argNum == argc) {
+    usage(argv[0]);
+    return 1;
+  }
+  
+  params[nbparams] = NULL;
+  xmlSubstituteEntitiesDefault(1);
+  xmlLoadExtDtdDefaultValue = 1;
+  cur = xsltParseStylesheetFile((const xmlChar *)argv[argNum]);
+  argNum++;
+  doc = xmlParseFile(argv[argNum]);
+  res = xsltApplyStylesheet(cur, doc, params);
+  xsltSaveResultToFile(stdout, res, cur);
+  
+  xsltFreeStylesheet(cur);
+  xmlFreeDoc(res);
+  xmlFreeDoc(doc);
+  
+  xsltCleanupGlobals();
+  xmlCleanupParser();
+  return 0;
+}