ToxicBox is a jQuery lightbox plugin that displays pictures, containers, and notifications in a popup window.
Stackbox is a jQuery plugin for creating stackable modal boxes. It's also easy to customize using CSS / LESS.
A simple & lightweight popdown dialog plugin.
It's a simple dialog that pops down from the top of your browser window once it's loaded HTML in the background. A simple way to load web forms, content, user feedback messages, media and any other in place style content.
Pop Easy is a lightweight jQuery plugin that is a must have for any developer to easily create modal windows. Put focus on important elements by applying a mask to your page and opening a customizable pop up modal window.
ClassyBox is a jQuery plugin that is a complex LightBox alternative with support for the most popular video services, enabling you to embed a media gallery on your site.
Simple Modal is a small plugin to create modal windows. It can be used to generate alert or confirm messages with few lines of code.
Simple Modal is not a lightbox although the possibility to hide parts of its layout may partially make it similar.