Tablesorter is a jQuery plugin for turning a standard HTML table with THEAD and TBODY tags into a sortable table without page refreshes. Tablesorter can successfully parse and sort many types of data including linked data in a cell. It has many useful features including:

• Multi-column sorting
• Parsers for sorting text, URIs, integers, currency, floats, IP addresses, dates (ISO, long and short formats), time. Add your own easily
• Support for ROWSPAN and COLSPAN on TH elements
• Support secondary “hidden” sorting (e.g., maintain alphabetical sort when sorting on other criteria)
• Extensibility via widget system
• Small code size (7,4kb packed)

*** You can sort multiple columns simultaneously by holding down the shift key and clicking a second, third or even fourth column header.

Requirements: jQuery
Demo: http://tablesorter.com/
License: GPL and MIT License