diff --git a/src/com/annimon/ownlang/lib/modules/files.java b/src/com/annimon/ownlang/lib/modules/files.java
index b106bb1..68b8c35 100644
--- a/src/com/annimon/ownlang/lib/modules/files.java
+++ b/src/com/annimon/ownlang/lib/modules/files.java
@@ -31,6 +31,7 @@ public final class files implements Module {
         Functions.set("fopen", new fopen());
         Functions.set("listFiles", new listFiles());
         Functions.set("delete", new delete());
+        Functions.set("rename", new rename());
         Functions.set("exists", new exists());
         Functions.set("isDirectory", new isDirectory());
         Functions.set("isFile", new isFile());
@@ -51,6 +52,7 @@ public final class files implements Module {
         Functions.set("readText", new readText());
         Functions.set("writeBoolean", new writeBoolean());
         Functions.set("writeByte", new writeByte());
+        Functions.set("writeBytes", new writeBytes());
         Functions.set("writeChar", new writeChar());
         Functions.set("writeShort", new writeShort());
         Functions.set("writeInt", new writeInt());
@@ -161,6 +163,16 @@ public final class files implements Module {
             return NumberValue.fromBoolean(fileInfo.file.mkdir());
         }
     }
+
+    private static class rename extends FileFunction {
+        @Override
+        protected Value execute(FileInfo fileInfo, Value[] args) throws IOException {
+            final File dest = files.get(args[1].asInt()).file;
+            System.out.println(fileInfo.file);
+            System.out.println(dest);
+            return NumberValue.fromBoolean(fileInfo.file.renameTo(dest));
+        }
+    }
     
     private static class fileSize extends FileFunction {
         @Override
@@ -306,6 +318,24 @@ public final class files implements Module {
             return NumberValue.ONE;
         }
     }
+
+    private static class writeBytes extends FileFunction {
+        @Override
+        protected Value execute(FileInfo fileInfo, Value[] args) throws IOException {
+            final ArrayValue array = (ArrayValue) args[1];
+            int offset = 0, length = array.size();
+            final byte[] bytes = new byte[length];
+            for (int i = 0; i < length; i++) {
+                bytes[i] = (byte) (array.get(i).asInt() & 0xFF);
+            }
+            if (args.length > 3) {
+                offset = args[2].asInt();
+                length = args[3].asInt();
+            }
+            fileInfo.dos.write(bytes, offset, length);
+            return NumberValue.ONE;
+        }
+    }
     
     private static class writeChar extends FileFunction {
         @Override
diff --git a/src/com/annimon/ownlang/lib/modules/functions/http_download.java b/src/com/annimon/ownlang/lib/modules/functions/http_download.java
new file mode 100644
index 0000000..4607797
--- /dev/null
+++ b/src/com/annimon/ownlang/lib/modules/functions/http_download.java
@@ -0,0 +1,23 @@
+package com.annimon.ownlang.lib.modules.functions;
+
+import com.annimon.ownlang.lib.*;
+import java.io.IOException;
+import okhttp3.*;
+
+public final class http_download implements Function {
+    
+    private final OkHttpClient client = new OkHttpClient();
+
+    @Override
+    public Value execute(Value... args) {
+        Arguments.check(1, args.length);
+        try {
+            final Response response = client.newCall(
+                    new Request.Builder().url(args[0].asString()).build())
+                    .execute();
+            return ArrayValue.of(response.body().bytes());
+        } catch (IOException ex) {
+            return new ArrayValue(0);
+        }
+    }
+}
\ No newline at end of file
diff --git a/src/com/annimon/ownlang/lib/modules/http.java b/src/com/annimon/ownlang/lib/modules/http.java
index 1138cbd..ceaa193 100644
--- a/src/com/annimon/ownlang/lib/modules/http.java
+++ b/src/com/annimon/ownlang/lib/modules/http.java
@@ -13,5 +13,6 @@ public final class http implements Module {
     public void init() {
         Functions.set("urlencode", new http_urlencode());
         Functions.set("http", new http_http());
+        Functions.set("download", new http_download());
     }
 }