diff --git a/atom/browser/api/atom_api_app.cc b/atom/browser/api/atom_api_app.cc
index 942485397081..858e6ef197e8 100644
--- a/atom/browser/api/atom_api_app.cc
+++ b/atom/browser/api/atom_api_app.cc
@@ -134,6 +134,13 @@ void App::ResolveProxy(const GURL& url, ResolveProxyCallback callback) {
   new ResolveProxyHelper(url, callback);
 }
 
+void App::SetDesktopName(const std::string& desktop_name) {
+#if defined(OS_LINUX)
+  scoped_ptr<base::Environment> env(base::Environment::Create());
+  env->SetVar("CHROME_DESKTOP", desktop_name);
+#endif
+}
+
 mate::ObjectTemplateBuilder App::GetObjectTemplateBuilder(
     v8::Isolate* isolate) {
   Browser* browser = Browser::Get();
@@ -151,7 +158,8 @@ mate::ObjectTemplateBuilder App::GetObjectTemplateBuilder(
       .SetMethod("setName", base::Bind(&Browser::SetName,
                                        base::Unretained(browser)))
       .SetMethod("getDataPath", &App::GetDataPath)
-      .SetMethod("resolveProxy", &App::ResolveProxy);
+      .SetMethod("resolveProxy", &App::ResolveProxy)
+      .SetMethod("setDesktopName", &App::SetDesktopName);
 }
 
 // static
diff --git a/atom/browser/api/atom_api_app.h b/atom/browser/api/atom_api_app.h
index 91aa16b8207a..0fcbf2c0a907 100644
--- a/atom/browser/api/atom_api_app.h
+++ b/atom/browser/api/atom_api_app.h
@@ -50,6 +50,7 @@ class App : public mate::EventEmitter,
  private:
   base::FilePath GetDataPath();
   void ResolveProxy(const GURL& url, ResolveProxyCallback callback);
+  void SetDesktopName(const std::string& desktop_name);
 
   DISALLOW_COPY_AND_ASSIGN(App);
 };
diff --git a/atom/browser/api/atom_api_window.cc b/atom/browser/api/atom_api_window.cc
index 9b7cb204df3b..40498153c3fe 100644
--- a/atom/browser/api/atom_api_window.cc
+++ b/atom/browser/api/atom_api_window.cc
@@ -366,6 +366,10 @@ void Window::Print(mate::Arguments* args) {
   window_->Print(settings.silent, settings.print_backgournd);
 }
 
+void Window::SetProgressBar(double progress) {
+  window_->SetProgressBar(progress);
+}
+
 mate::Handle<WebContents> Window::GetWebContents(v8::Isolate* isolate) const {
   return WebContents::Create(isolate, window_->GetWebContents());
 }
@@ -428,6 +432,7 @@ void Window::BuildPrototype(v8::Isolate* isolate,
       .SetMethod("isWebViewFocused", &Window::IsWebViewFocused)
       .SetMethod("capturePage", &Window::CapturePage)
       .SetMethod("print", &Window::Print)
+      .SetMethod("setProgressBar", &Window::SetProgressBar)
       .SetMethod("_getWebContents", &Window::GetWebContents)
       .SetMethod("_getDevToolsWebContents", &Window::GetDevToolsWebContents);
 }
diff --git a/atom/browser/api/atom_api_window.h b/atom/browser/api/atom_api_window.h
index e558b5ce00d3..25ea3700cf81 100644
--- a/atom/browser/api/atom_api_window.h
+++ b/atom/browser/api/atom_api_window.h
@@ -103,6 +103,7 @@ class Window : public mate::EventEmitter,
   bool IsDocumentEdited();
   void CapturePage(mate::Arguments* args);
   void Print(mate::Arguments* args);
+  void SetProgressBar(double progress);
 
   // APIs for WebContents.
   mate::Handle<WebContents> GetWebContents(v8::Isolate* isolate) const;
diff --git a/atom/browser/lib/init.coffee b/atom/browser/lib/init.coffee
index be752382b831..d25179c1ba49 100644
--- a/atom/browser/lib/init.coffee
+++ b/atom/browser/lib/init.coffee
@@ -77,6 +77,12 @@ setImmediate ->
   else if packageJson.name?
     app.setName packageJson.name
 
+  # Set application's desktop name.
+  if packageJson.desktopName?
+    app.setDesktopName packageJson.desktopName
+  else 
+    app.setDesktopName '#{app.getName()}.desktop'
+
   # Load the chrome extension support.
   require './chrome-extension.js'
 
diff --git a/atom/browser/native_window.h b/atom/browser/native_window.h
index 1da62ce3f7bd..929c1aabc5bb 100644
--- a/atom/browser/native_window.h
+++ b/atom/browser/native_window.h
@@ -140,6 +140,7 @@ class NativeWindow : public brightray::DefaultWebContentsDelegate,
   virtual void SetMenu(ui::MenuModel* menu);
   virtual bool HasModalDialog();
   virtual gfx::NativeWindow GetNativeWindow() = 0;
+  virtual void SetProgressBar(double progress) = 0;
 
   virtual bool IsClosed() const { return is_closed_; }
   virtual void OpenDevTools();
diff --git a/atom/browser/native_window_mac.h b/atom/browser/native_window_mac.h
index 0f3e26f9a387..ecdabc800cd5 100644
--- a/atom/browser/native_window_mac.h
+++ b/atom/browser/native_window_mac.h
@@ -65,6 +65,7 @@ class NativeWindowMac : public NativeWindow {
   virtual bool IsDocumentEdited() OVERRIDE;
   virtual bool HasModalDialog() OVERRIDE;
   virtual gfx::NativeWindow GetNativeWindow() OVERRIDE;
+  virtual void SetProgressBar(double progress) OVERRIDE;
 
   // Returns true if |point| in local Cocoa coordinate system falls within
   // the draggable region.
diff --git a/atom/browser/native_window_mac.mm b/atom/browser/native_window_mac.mm
index 587dcc602ed3..c5fd5522d6d2 100644
--- a/atom/browser/native_window_mac.mm
+++ b/atom/browser/native_window_mac.mm
@@ -193,6 +193,39 @@ static const CGFloat kAtomWindowCornerRadius = 4.0;
 
 @end
 
+@interface AtomProgressBar : NSProgressIndicator
+@end
+
+@implementation AtomProgressBar
+
+- (void)drawRect:(NSRect)dirtyRect {
+  if (self.style != NSProgressIndicatorBarStyle)
+    return;
+  // Draw edges of rounded rect.
+  NSRect rect = NSInsetRect([self bounds], 1.0, 1.0);
+  CGFloat radius = rect.size.height / 2;
+  NSBezierPath* bezier_path = [NSBezierPath bezierPathWithRoundedRect:rect xRadius:radius yRadius:radius];
+  [bezier_path setLineWidth:2.0];
+  [[NSColor grayColor] set];
+  [bezier_path stroke];
+
+  // Fill the rounded rect.
+  rect = NSInsetRect(rect, 2.0, 2.0);
+  radius = rect.size.height / 2;
+  bezier_path = [NSBezierPath bezierPathWithRoundedRect:rect xRadius:radius yRadius:radius];
+  [bezier_path setLineWidth:1.0];
+  [bezier_path addClip];
+
+  // Calculate the progress width.
+  rect.size.width = floor(rect.size.width * ([self doubleValue] / [self maxValue]));
+
+  // Fill the progress bar with color blue.
+  [[NSColor colorWithSRGBRed:0.2 green:0.6 blue:1 alpha:1] set];
+  NSRectFill(rect);
+}
+
+@end
+
 namespace atom {
 
 NativeWindowMac::NativeWindowMac(content::WebContents* web_contents,
@@ -517,6 +550,39 @@ gfx::NativeWindow NativeWindowMac::GetNativeWindow() {
   return window_;
 }
 
+void NativeWindowMac::SetProgressBar(double progress) {
+  NSDockTile* dock_tile = [NSApp dockTile];
+
+  // For the first time API invoked, we need to create a ContentView in DockTile.
+  if (dock_tile.contentView == NULL) {
+    NSImageView* image_view = [[NSImageView alloc] init];
+    [image_view setImage:[NSApp applicationIconImage]];
+    [dock_tile setContentView:image_view];
+
+    NSProgressIndicator* progress_indicator = [[AtomProgressBar alloc]
+        initWithFrame:NSMakeRect(0.0f, 0.0f, dock_tile.size.width, 15.0)];
+    [progress_indicator setStyle:NSProgressIndicatorBarStyle];
+    [progress_indicator setIndeterminate:NO];
+    [progress_indicator setBezeled:YES];
+    [progress_indicator setMinValue:0];
+    [progress_indicator setMaxValue:1];
+    [progress_indicator setHidden:NO];
+    [image_view addSubview:progress_indicator];
+  }
+
+  NSProgressIndicator* progress_indicator =
+      static_cast<NSProgressIndicator*>([[[dock_tile contentView] subviews]
+           objectAtIndex:0]);
+  if (progress < 0) {
+    [progress_indicator setHidden:YES];
+  } else if (progress > 1) {
+    [progress_indicator setIndeterminate:YES];
+  } else {
+    [progress_indicator setDoubleValue:progress];
+  }
+  [dock_tile display];
+}
+
 bool NativeWindowMac::IsWithinDraggableRegion(NSPoint point) const {
   if (!draggable_region_)
     return false;
diff --git a/atom/browser/native_window_views.cc b/atom/browser/native_window_views.cc
index 3892b7181b94..08c23cc3d153 100644
--- a/atom/browser/native_window_views.cc
+++ b/atom/browser/native_window_views.cc
@@ -43,7 +43,9 @@
 #elif defined(OS_WIN)
 #include "atom/browser/ui/views/win_frame_view.h"
 #include "base/win/scoped_comptr.h"
+#include "base/win/windows_version.h"
 #include "ui/base/win/shell.h"
+#include "ui/views/win/hwnd_util.h"
 #endif
 
 namespace atom {
@@ -479,6 +481,33 @@ gfx::NativeWindow NativeWindowViews::GetNativeWindow() {
   return window_->GetNativeWindow();
 }
 
+void NativeWindowViews::SetProgressBar(double progress) {
+#if defined(OS_WIN)
+  if (base::win::GetVersion() < base::win::VERSION_WIN7)
+    return;
+  base::win::ScopedComPtr<ITaskbarList3> taskbar;
+  if (FAILED(taskbar.CreateInstance(CLSID_TaskbarList, NULL,
+                                    CLSCTX_INPROC_SERVER) ||
+      FAILED(taskbar->HrInit()))) {
+    return;
+  }
+  HWND frame = views::HWNDForNativeWindow(GetNativeWindow());
+  if (progress > 1.0) {
+    taskbar->SetProgressState(frame, TBPF_INDETERMINATE);
+  } else if (progress < 0) {
+    taskbar->SetProgressState(frame, TBPF_NOPROGRESS);
+  } else if (progress >= 0) {
+    taskbar->SetProgressValue(frame,
+                              static_cast<int>(progress * 100),
+                              progress);
+  }
+#elif defined(USE_X11)
+  if (unity::IsRunning()) {
+    unity::SetProgressFraction(progress);
+  }
+#endif
+}
+
 gfx::AcceleratedWidget NativeWindowViews::GetAcceleratedWidget() {
   return GetNativeWindow()->GetHost()->GetAcceleratedWidget();
 }
diff --git a/atom/browser/native_window_views.h b/atom/browser/native_window_views.h
index 3d81a68be224..b38769c39265 100644
--- a/atom/browser/native_window_views.h
+++ b/atom/browser/native_window_views.h
@@ -71,6 +71,7 @@ class NativeWindowViews : public NativeWindow,
   virtual bool IsKiosk() OVERRIDE;
   virtual void SetMenu(ui::MenuModel* menu_model) OVERRIDE;
   virtual gfx::NativeWindow GetNativeWindow() OVERRIDE;
+  virtual void SetProgressBar(double value) OVERRIDE;
 
   gfx::AcceleratedWidget GetAcceleratedWidget();
 
diff --git a/docs/api/browser-window.md b/docs/api/browser-window.md
index f8928327e5be..de8da2e32eec 100644
--- a/docs/api/browser-window.md
+++ b/docs/api/browser-window.md
@@ -488,6 +488,19 @@ Sets the `menu` as the window top menu.
 
 __Note:__ This API is not available on OS X.
 
+### BrowserWindow.setProgressBar(progress)
+
+* `progress` Double
+
+Sets progress value in progress bar. Valid range is [0, 1.0].
+
+Remove progress bar when progress < 0;
+Change to indeterminate mode when progress > 1.
+
+On Linux platform, only supports Unity desktop environment, you need to specify
+the `*.desktop` file name to `desktopName` field in `package.json`. By default,
+it will assume `app.getName().desktop`.
+
 ## Class: WebContents
 
 A `WebContents` is responsible for rendering and controlling a web page.