Best methods for simulating/testing performance under slow connections?

I am looking for a 'standard' tool for testing application performance under slower internet connections.

I found 开发者_开发百科this thread, but it appears the program is not designed for Windows 7. I am developing under Win 7 x64.

What other tools are out there which are worth taking a look at?

EDIT: I am exploring the usage of Sloppy right now. It seems like it will work best for my purposes. http://www.dallaway.com/sloppy/

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There are software options for this, but at work we connect to our lan through a switch with rate limiting capability whenever we need this functionality. Some of these hardware switches are pretty cheap, with the added bonus that there is no need to install any software on the computer (plus it works for any OS).

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The industry defacto tools for modeling impairment of slowed network connections come from Shunra (http://www.shunra.com). You can also use an open source solution like WANem (http://wanem.sourceforge.net) to represent less complex impairment situations.