diff --git a/express/express.d.ts b/express/express.d.ts
index e2f6d5df21..523f8f7c6f 100644
--- a/express/express.d.ts
+++ b/express/express.d.ts
@@ -108,6 +108,8 @@ declare module "express" {
             use(path: string, handler: ErrorRequestHandler): T;
             use(path: string[], ...handler: RequestHandler[]): T;
             use(path: string[], handler: ErrorRequestHandler): T;
+            use(path: RegExp, ...handler: RequestHandler[]): T;
+            use(path: RegExp, handler: ErrorRequestHandler): T;
         }
 
         export function Router(options?: any): Router;
diff --git a/node/node-tests.ts b/node/node-tests.ts
index bb0c5f678e..bd80329dca 100644
--- a/node/node-tests.ts
+++ b/node/node-tests.ts
@@ -13,6 +13,7 @@ import * as dgram from "dgram";
 import * as querystring from "querystring";
 import * as path from "path";
 import * as readline from "readline";
+import * as childProcess from "child_process";
 
 assert(1 + 1 - 2 === 0, "The universe isn't how it should.");
 
@@ -401,3 +402,10 @@ rl.prompt(true);
 rl.question("do you like typescript?", function(answer: string) {
   rl.close();
 });
+
+//////////////////////////////////////////////////////////////////////
+/// Child Process tests: https://nodejs.org/api/child_process.html ///
+//////////////////////////////////////////////////////////////////////
+
+childProcess.exec("echo test");
+childProcess.spawnSync("echo test");
diff --git a/node/node.d.ts b/node/node.d.ts
index b1436e16a1..458ed27cc8 100644
--- a/node/node.d.ts
+++ b/node/node.d.ts
@@ -868,6 +868,26 @@ declare module "child_process" {
         env?: any;
         encoding?: string;
     }): ChildProcess;
+    export function spawnSync(command: string, args?: string[], options?: {
+        cwd?: string;
+        input?: string | Buffer;
+        stdio?: any;
+        env?: any;
+        uid?: number;
+        gid?: number;
+        timeout?: number;
+        maxBuffer?: number;
+        killSignal?: string;
+        encoding?: string;
+    }): {
+        pid: number;
+        output: string[];
+        stdout: string | Buffer;
+        stderr: string | Buffer;
+        status: number;
+        signal: string;
+        error: Error;
+    };
     export function execSync(command: string, options?: {
         cwd?: string;
         input?: string|Buffer;
diff --git a/pngjs2/pngjs2-tests.ts b/pngjs2/pngjs2-tests.ts
new file mode 100644
index 0000000000..ae2d73e7b3
--- /dev/null
+++ b/pngjs2/pngjs2-tests.ts
@@ -0,0 +1,26 @@
+/// <reference path="pngjs2.d.ts" />
+
+import * as fs from "fs";
+import { PNG } from "pngjs2";
+
+let png = new PNG({ filterType: 4 });
+
+fs.createReadStream("in.png")
+  .pipe(png)
+  .on("parsed", () => {
+    for (let y = 0; y < png.height; y++) {
+      for (let x = 0; x < png.width; x++) {
+        let idx = (png.width * y + x) << 2;
+
+        // invert color
+        png.data[idx] = 255 - png.data[idx];
+        png.data[idx+1] = 255 - png.data[idx+1];
+        png.data[idx+2] = 255 - png.data[idx+2];
+
+        // and reduce opacity
+        png.data[idx+3] = png.data[idx+3] >> 1;
+      }
+    }
+
+    png.pack().pipe(fs.createWriteStream('out.png'));
+  });
diff --git a/pngjs2/pngjs2.d.ts b/pngjs2/pngjs2.d.ts
new file mode 100644
index 0000000000..e44dbfdd69
--- /dev/null
+++ b/pngjs2/pngjs2.d.ts
@@ -0,0 +1,64 @@
+// Type definitions for pngjs2 2.0.0
+// Project: https://www.npmjs.com/package/pngjs2
+// Definitions by: Elisée Maurer <https://sparklinlabs.com/>
+// Definitions: https://github.com/borisyankov/DefinitelyTyped
+
+/// <reference path="../node/node.d.ts" />
+
+declare module "pngjs2" {
+  import fs = require("fs");
+  import events = require("events");
+  import stream = require("stream");
+
+  interface PNGOptions {
+    width?: number;
+    height?: number;
+    checkCRC?: boolean;
+    deflateChunkSize?: number;
+    deflateLevel?: number;
+    deflateStrategy?: number;
+    deflateFactory?: any;
+    filterType?: number|number[];
+    colorType?: number;
+    inputHasAlpha?: boolean;
+  }
+  
+  interface PNGMetadata {
+    width: number;
+    height: number;
+    palette: boolean;
+    color: boolean;
+    alpha: boolean;
+    interlace: boolean;
+  }
+
+  export class PNG extends stream.Writable {
+    constructor(options?: PNGOptions);
+
+    width: number;
+    height: number;
+    data: Buffer;
+    gamma: number;
+
+    on(event: string, callback: Function): PNG;
+    on(event: "metadata", callback: (metadata: PNGMetadata) => void): PNG;
+    on(event: "parsed", callback: (data: Buffer) => void): PNG;
+    on(event: "error", callback: (err: Error) => void): PNG;
+
+    parse(data: string|Buffer, callback?: (err: Error, data: Buffer) => void): PNG;
+    pack(): PNG;
+    pipe(destination: fs.WriteStream): PNG;
+
+    static bitblt(src: PNG, dst: PNG, srcX: number, srcY: number,
+                  width: number, height: number, deltaX: number, deltaY: number): void;
+
+    bitblt(dst: PNG, srcX: number, srcY: number,
+           width: number, height: number, deltaX: number, deltaY: number): PNG;
+  }
+  
+  export namespace PNG {
+    namespace sync {
+      function read(buffer: string|Buffer, options?: PNGOptions): PNG;
+    }
+  }
+}