SIMPLEMODAL is a small plugin to create modal windows. It can be used to generate alert or confirm messages with few lines of code. Confirm configuration involves the use of callbacks to be applied to affirmative action; it can work in asynchronous mode and retrieve content from external pages or getting the inline content.
The jQuery UI Dialog plugin uses the jQuery UI Framework to build and give style which includes colors and background as well.
leanModal is lightweight jQuery plugin to create modal windows. It is quite flexible. It doesn't support Ajax, iFrame.
Reveal is awesome because it's easy to implement, is cross-browser compatible with modern browsers (with some graceful degradation of course) and lightweight coming in at only 1.75KB. What that means for you is that it's fast, sexy and just works.
jQuery Impromptu is an extension to help provide a more pleasant way to spontaneously prompt a user for input. More or less this is a great replacement for an alert, prompt, and confirm. Not only does it replace these but it also allows for creating forms within these controls.
Feel free to contact me for any help related to jQuery, I will gladly help you.