Wireframing tools for Responsive designs

Really there's no way to wireframe responsively, there's just wireframes are at different sizes.

These are all popular, shiny, web-based wireframing apps:

• HotGloo
• Mockingbird
• UXPin

@James Cheers feller, thanks for the answer :)

Another tool (I haven't used it but have heard from a designer that it's quite useful).

http://www.balsamiq.com/

Actually Adobe Reflow will allow you to easily wireframe with responsiveness in mind. It will also give you the CSS you need to make it happen.

http://html.adobe.com/edge/reflow/

It looks like Reflow closer to click-able prototype tool than a wireframing tool.

It reminds me of Jetstrap, which does a similar thing using a drag-and-drop interface and the Bootstrap framework.

Here's a good intro to reflow for anyone whose interested

If you use Reflow for about 15 minutes you'll see how adept it can be for wireframing.

The added bonus is that you can take it even further to a workable live prototype and then export the CSS as needed.

Not to mention it saves a ton of time.

Good video explaining and showing what Reflow is:

http://tv.adobe.com/watch/adobe-edge-reflow/introduction-to-reflow/

Sharpie and printer paper :)