CalendarPicker is a free ultra-light calendar/date-picker jQuery plugin. It looks different from all the others, supports multiple languages, and allows fast movement across months and years. This approach might not suitable for every context, but I am sure someone will find it useful.

CalendarPicker enables mouse wheel to change dates; it is enabled on years, months and days bars. Calendar picker is released under MIT license.

URL: http://bugsvoice.com/applications/bugsVoice/site/test/calendarPickerDemo.jsp

jsDatePick is a javascript date picker that uses DOM techniques to generate its HTML code. Read the parameters and working examples below, and within minutes, you can have a popup date picking solution on your website.

The user launches the calendar by entering the input field, and then chooses a date, automatically returning the selected date to the field. jsDatePick has a range of parameters for extending or limiting default functionality.

URL: http://javascriptcalendar.org/javascript-date-picker.php

FullCalendar is a jQuery plugin that provides a full-sized, drag & drop calendar. It uses AJAX to fetch events on-the-fly for each month and is easily configured to use your own feed format (an extension is provided for Google Calendar). It is visually customizable and exposes hooks for user-triggered events (like clicking or dragging an event).

FullCalendar is great for displaying events, but it isn

dhtmlxScheduler is a web-based event calendar which provides simple in-browser scheduling solution. With smooth Ajax-enabled interface dhtmlxScheduler allows users to add, modify or delete events without refreshing the web page.

Intuitive drag-n-drop behavior gives the possibility to change events date and start/end time by simply dragging the event boxes. The calendar events can be displayed in Day/Week/Month views.

dhtmlxScheduler is very lightweight (about 19KB gzipped), cross-browser and highly customizable. Each aspect of the calendar interface can be configured through JavaScript API. Developers can easily add/update events, change date format, time scale or calendar language.

Although dhtmlxScheduler is a pure JavaScript solution, it can be easily connected to the backend database with the help of dhtmlxConnector, a PHP extension that enables data communication between client-side interface and server-side datasource.

You can also use your own server-side code written in any language (PHP, Java, ASP, etc.) to bind scheduler content to the database. dhtmlxScheduler is distributed under GNU GPL and commercial licenses.

URL: http://dhtmlx.com/docs/products/dhtmlxScheduler

After the success of Vista-like Ajax Calendar, dev.base86 has recently released Calender Eightysix. It is completely built from scratch with pure javascript, making use of some of the superb features the latest MooTools javascript framework has to offer.

Calender Eightysix is an unobtrusive developer friendly javascript calendar and datepicker offering a better user experience for date related functionalities. Calendar Eightysix has a variety of options to style and format the calendar to your needs. This is done by providing options while instantiating the class.

URL: http://dev.base86.com/scripts/datepicker_calendar_eightysix.html