Sebastian Tschan
File Upload widget with multiple file selection, drag&drop support, progress bar, validation and preview images, audio and video for jQuery. Supports cross-domain, chunked and resumable file uploads. Works with any server-side platform (Google App Engine, PHP, Python, Ruby on Rails, Java, etc.) that supports standard HTML form file uploads.
Daniel Imhoff
jQuery plugin for getting, setting, and replacing the selected text in input fields and textareas.
Alfredo Berumen
tCheckAll is a jquery plugin that allows you to check and uncheck all your checkboxes.
Alfredo Berumen
tShift is a jquery plugin that allows you to use shift selection in your checkboxes.