Milat jQuery Automatic Popup (milat-jquery-automatic-popup) free WordPress plugin

Choose Where Your Popup Is Displayed

Only want your popup in some areas on your site? You can select whether you want them displayed on your posts, pages, or your home page.

Preview

Visual Text Editor

Now, no more clunky HTML code to deal with on your popup. Using the WordPress built-in WYSIWYG editor, you can now just worry about what you want to say, and not how to display it.

Stop Bugging Return Visitors

Don’t want your return visitors to see this box every time they go back? Don’t want your popup to show on every post people read? Now you can set how often a person sees your popup.

work right every time.

http://www.milat.org/