A link worth bookmarking The 21 best jQuery plugins
Unheap is a really nice and tidy repository of jQuery plugins
Take a look at this great list of open source jQuery plugins for building single-page website layouts
Cycle2 is a versatile slideshow plugin for jQuery built around ease-of-use
Magnific Pop up is an open-source lightbox plugin focused on performance and responsive to your viewport. Check it out.
A jQuery plugin with similar functionality as the iOS App icon grid: Thumbnail Grid with Expanding Preview