Registration Form

Hi Guys,

I want a sign up or registration input form on my site's homepage only.
WP sign up are all redirect to inner page I want it outside (homepage).
As you can see on facebook.com and twitter.com their on the actual
homepage. Are there any plugins or widget for as for my requirement?
If so, please provide link(s).

I don't code, so no need to suggest I custom make my template.

Thx