Date, Time and Clock
A date pickers usually can handle dates only, here we have a jQuery time picker plugin.
Here we go with jQuery carousel plugin (microfiche.js), that is easy to use and touch-friendly. A solution that helps to create a carousel-like slideshow quickly.
Upvote is a nice jQuery stackoverflow voting plugin, that implements voting widgets known from Stack Overflow / Stack Exchange sites.
Multi-Level, right-click / context menu with jQuery. Creating context menu easy using ContextJS plugin.
Add to your website a functionality of text resize by click.